An introduction to algebra. To which is added an appendix containing a synopsis on variable quantities by S. Maynard1836 - 80 pages |
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Page 81
... substituted for the unknown quantity , will make both sides of the equation vanish , or become equal to each other . A simple equation can have only one root ; but every compound equation has as many roots as it contains dimen- sions ...
... substituted for the unknown quantity , will make both sides of the equation vanish , or become equal to each other . A simple equation can have only one root ; but every compound equation has as many roots as it contains dimen- sions ...
Page 91
... substituted for x in the second , X gives 3 ( 17-2y ) -y = 2 , or 51-6y - y = 2 , or 7y = 51-2 = 49 . Whence y = 7 2. Given 49 7 , and 17-2y = 3 . to find the values of x and y . Jx + y = 13 ) x - y == 3 ) Here from the first equation ...
... substituted for x in the second , X gives 3 ( 17-2y ) -y = 2 , or 51-6y - y = 2 , or 7y = 51-2 = 49 . Whence y = 7 2. Given 49 7 , and 17-2y = 3 . to find the values of x and y . Jx + y = 13 ) x - y == 3 ) Here from the first equation ...
Page 92
John Bonnycastle. and this value , substituted for a in the second , ay gives ( 2 ) * + y2 = c , or a2y2 + y2 = c . b2 Whence we have a2y2 + b2y2 = b3c , or y2 = с b2c a2 + b29 and consequently , y = b√ ↓ 2 + 6o , and x = a√ a2- 1 a2 ...
John Bonnycastle. and this value , substituted for a in the second , ay gives ( 2 ) * + y2 = c , or a2y2 + y2 = c . b2 Whence we have a2y2 + b2y2 = b3c , or y2 = с b2c a2 + b29 and consequently , y = b√ ↓ 2 + 6o , and x = a√ a2- 1 a2 ...
Page 118
... happen to be , be substituted for the original un- known quantity and its powers in the proposed equation , there will arise an equation wanting its second term . Note . The second term of any of the higher 118 QUADRATIC EQUATIONS .
... happen to be , be substituted for the original un- known quantity and its powers in the proposed equation , there will arise an equation wanting its second term . Note . The second term of any of the higher 118 QUADRATIC EQUATIONS .
Page 120
... substituted for a and b in either of the following formulæ , the result will give one of the roots required . x2 + ax = b + b2 a3 + b2 + 27 27 or b2 Τα b2 + a3 27 + + 27 } where it is to be observed , that when the coefficient a of the ...
... substituted for a and b in either of the following formulæ , the result will give one of the roots required . x2 + ax = b + b2 a3 + b2 + 27 27 or b2 Τα b2 + a3 27 + + 27 } where it is to be observed , that when the coefficient a of the ...
Common terms and phrases
Algebra arithmetical arithmetical mean arithmetical series binomial coefficient common denominator consequently constant quantity cube root cubic equation decimal Defi denoted determine diff dividend division divisor equal EXAMPLES FOR PRACTICE expression find the difference find the square find the sum find the value find three find two numbers fraction geometrical mean geometrical series give given number greatest common measure Hence improper fraction infinite series last term latter logarithms method multiplied natural numbers negative nth root number of terms orders of differences perpendicular plane triangle PROBLEM proportion quadratic equation question quotient rational remaining Required the sum required to convert required to divide required to find required to reduce result rule second term simple form square number square root substituted subtract surd third tion unknown quantity Whence whole numbers
Popular passages
Page 36 - Now .} of f- is a compound fraction, whose value is found by multiplying the numerators together for a new numerator, and the denominators for a new denominator.
Page 18 - Divide the first term of the dividend by the first term of the divisor, and write the result as the first term of the quotient. Multiply the whole divisor by the first term of the quotient, and subtract the product from the dividend.
Page 40 - ... required. Or, multiply the quantity into itself as many times, less one, as is denoted by the index of the power, and the last product will be tJie answer.
Page 117 - What two numbers are those whose sum, multiplied by the greater, is equal to 77 ; and whose difference, multiplied by the less, is equal to 12 ? Ans.
Page 26 - To reduce a mixed number to an improper fraction, Multiply the whole number by the denominator of the fraction, and to the product add the numerator; under this sum write the denominator.
Page 48 - ... and the quotient will be the next term Of the root. Involve the whole of the root, thus found, to its proper power, which subtract from the given quantity, and divide the first term of the remainder by the same divisor as before; and proceed in this manner till the whole is finished.* EXAMPLES.
Page 116 - Divide the number 24 into two such parts, that their product shall be to the sum of their squares, as 3 to 10.
Page 76 - One hundred stones being placed on the ground in a straight line, at the distance of 2 yards from each other, how far will a person travel who shall bring them one by one to a basket, placed at 2 yards from the first stone ? Ans.
Page 82 - Any quantity may be transposed from one side of an equation to the other, if, at the same time, its sign, be changed.
Page 2 - It denotes that the quantities between which it is placed are equal to each other. Thus, o=3, denotes that the quantity represented by a is equal to 3.