Solve the equation below by factoring. $a ^ { 2 } + 8 a + 25 = 9$
A) $a = - 4$ and $a = 0$
B) $a = - 4$
C) $a = 0$ and $a = 4$
D) $a = - 4$ and $a = 4$
E) $a = 4$

Question

Quizplus · Accepted Answer

First, we rewrite the equation as $a^2 + 8a + 16 = 0$ by subtracting 9 from both sides to get $a^2 + 8a + 16 = 0$. This can be factored into $(a + 4)^2 = 0$, which implies $a + 4 = 0$, so $a = -4$.

Solve the Equation Below by Factoring a2+8a+25=9a ^ { 2 } + 8 a + 25 = 9a2+8a+25=9

Solve the Equation Below by Factoring $a ^ { 2 } + 8 a + 25 = 9$