Simplify the expression: (w+5)^2

Question

My answer: w^2+25

Answer 1

I don't thinks it's +25 but I do think it's +10 as 2x5=10.
you could always try a genrator on google.
tell me how you get on.

Answer 2

(w+5)^2 = (w+5)(w+5)
= w^2 + 10w + 25

you could have easily discovered your answer was wrong by substituting in a value for w, say w=1

(w+5)^2 = (1+5)^2 = 6^2 = 36
w^2+25 = 1+25 = 26
Bzzzzt!