Factor: $49 z ^ { 2 } + 28 z + 4$
A) $( 2 + 7 z ) ( 2 - 7 z )$
B) $( 7 z - 2 ) ^ { 2 }$
C) $( 7 z + 2 ) ^ { 2 }$
D) $( 7 z + 2 ) ( 7 z - 2 )$
E) Nonfactorable over the integers

Question

Quizplus · Accepted Answer

The given expression is a perfect square trinomial, factoring into $(7z + 2)^2$, since $(7z)^2 = 49z^2$, $2 \cdot 7z \cdot 2 = 28z$, and $2^2 = 4$.

Factor 49z2+28z+449 z ^ { 2 } + 28 z + 449z2+28z+4

Factor $49 z ^ { 2 } + 28 z + 4$