Answer
$(x+5)^2$
Work Step by Step
RECALL:
A perfect square trinomial can be factored using either of the following formulas:
(i) $A^2-2AB+B^2=(A-B)^2$
(ii) $A^2+2AB+B^2=(A+B)^2$
The given trinomial can be written as:
$=x^2+2(x)(5)+5^2$
The trinomial is a perfect square.
Factor using formula (ii) above with $A=x$ and $B=5$ to obtain:
$=(x+5)^2$
