Factor the polynomial completely. $4 a ^ { 4 } + 25 a ^ { 2 }$
A) $a ^ { 2 } \left( 4 a ^ { 2 } + 25 \right)$
B) $a ^ { 2 } \left( 4 a ^ { 2 } - 25 \right)$
C) $a \left( 4 a ^ { 3 } + 25 a \right)$
D) $a ^ { 2 } ( 2 a + 5 ) ( 2 a - 5 )$
E) none of these

Question

Quizplus · Accepted Answer

We can factor out a common factor of $a^2$ to get $4a^4 + 25a^2 = a^2(4a^2+25)$. This cannot be factored any further, so the answer is $\boxed{	extbf{(A)}\ a^2(4a^2+25)}$.

Factor the Polynomial Completely 4a4+25a24 a ^ { 4 } + 25 a ^ { 2 }4a4+25a2

Factor the Polynomial Completely $4 a ^ { 4 } + 25 a ^ { 2 }$