The product of two integers is 112 . one number is four more then three times the other . which of the following equations could be used to find one of the numbers ? a. 3x^2+4x=112 b. 4x^2+3=112 c. 4x^2+3x=112 d. 3x^2+4=112

x, y - two integers

the product of two integers is 112

(1)      xy = 112

one number is four more then three times the other

(2)     y = 3x + 4             substitute it to (1)

x(3x + 4) = 112      use distributive property

(x)(3x) + (x)(4) = 112

3x² + 4x = 112

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