X(7 - x) > 8 A. 8 B.2 C. -1 D.0

asked Sep 9, 2018 84.3k views

1 vote

by Keigo

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5 votes

=7x-x^2>8
0=7x-x^2-8
0= -x^2 + 7x -8
0=(x^2 + 8x)-(x - 8)
0=x(x + 8)-1(x +8)
0=(x-1) 0=(x+8)
x=1 x= -8

Viral Modi answered Sep 15, 2018

7.8k points

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