A. -5/3 and b -9/7. the formula is y2-y1 and x2-x1
to find the area of a rectangle is LxW=A
plug in the given numbers you have
L = 7
W = x-8
A = 42
7 * x-8 = 42
7x-56= 42
solve for X
-6 + 7 = 1 and -6*7 = -42
So f(x) = (x + 7)(x - 6)
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