Solve: $( x - 4 ) ( x + 3 ) = 8$
A) $\{ - 3,4 \}$
B) $\{ 5,4 \}$
C) $\{ - 5,4 \}$
D) $\{ - 4,5 \}$

Name: Solve: $( x - 4 ) ( x + 3 ) = 8$ A) $\{ - 3,4 \}$ B) $\{ 5,4 \}$ C) $\{ - 5,4 \}$ D) $\{ - 4,5 \}$
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Question

Quizplus · Accepted Answer

Using the FOIL method, we get $x^2-x-12=8$, or $x^2-x-20=0$. Factoring, we get $(x-5)(x+4)=0$, so $x=5,-4$. Therefore, the answer is $\boxed{	ext{(D)}\ \{-4,5\}}$.

Solve (x−4)(x+3)=8( x - 4 ) ( x + 3 ) = 8(x−4)(x+3)=8

Solve $( x - 4 ) ( x + 3 ) = 8$