The product of two numbers is 1856. The sum is ninety. What is the difference of these two numbers? A. 30 B. 28 C. 26 D. 24
The product of two numbers is 1856. The sum is ninety. 26 is the difference of these two numbers. Let the two numbers be x and y. xy = 1856; x + y = 90; x(90 - x) = 1856; 90x - x^2 = 1856; x^2 - 90x + 1856 = 0; (x - 32)(x - 58) = 0; x = 32 or x = 58; when x = 32,y = 58; wen x = 58,y = 32 58 - 32 = 26
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Updated 4/29/2016 8:19:09 PM
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3
The product of two numbers is 1856. The sum is ninety. 26 is the difference of these two numbers. Let the two numbers be x and y.
xy = 1856;
x + y = 90;
x(90 - x) = 1856;
90x - x^2 = 1856;
x^2 - 90x + 1856 = 0;
(x - 32)(x - 58) = 0;
x = 32 or x = 58;
when x = 32,y = 58;
wen x = 58,y = 32
58 - 32 = 26
Confirmed by Andrew. [4/29/2016 8:51:55 PM]

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