Question

I need some help on 2 questions please?

1. Which trinomials are perfect square trinomials?

Select all correct answers.

a^2+15a+75

a^2+14a+49

a^2+4a+16

a^2+26a+169

2. Which expressions are differences of squares?

a^2-36

x^2+25

n^2-50

w^2-121

Answer 1

1) Perfect squares:

a²+14a+49 = (a+7)²
a²+26a+169 =(a+13)²

2) Differences of squares

a²-36 = (a-6)(a+6)
w²-121 = (w-11)(ww+11)