Solve by factoring.
-$-15 x^{2}-15 x+300=0$
A) $\{4,5\}$
B) $\{4,-5\}$
C) $\{4,-5\}$.
D) $\{-4,5\}$

Name: Solve by factoring. -$-15 x^{2}-15 x+300=0$ A) $\{4,5\}$ B) $\{4,-5\}$ C) $\{4,-5\}$. D) $\{-4,5\}$
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Question

Quizplus · Accepted Answer

First, factor out the greatest common factor, which is -15: $-15(x^2 + x - 20) = 0$. Then, factor the quadratic equation inside the parentheses: $-15(x + 5)(x - 4) = 0$. The solutions are $x = -5$ and $x = 4$, so the correct choice is $\{4, -5\}$.

Solve by Factoring −15x2−15x+300=0-15 x^{2}-15 x+300=0−15x2−15x+300=0 A) {4,5}\{4,5\}{4,5} B) {4,−5}\{4,-5\}{4,−5} C) {4,−5}\{4,-5\}{4,−5} D) {−4,5}\{-4,5\}{−4,5}

Solve by Factoring $-15 x^{2}-15 x+300=0$ A) $\{4,5\}$ B) $\{4,-5\}$ C) $\{4,-5\}$
D) $\{-4,5\}$