Question

Which of the following is a perfect square trinomial?

Answer 1

A.25x2 - 16xy + 9y2
B.25x2 + 16xy - 9y2
C.25x2 - 30xy + 9y2
D.25x2 + 30xy - 9y2

Answer 2

(a+b)^2=a*a+2*a*b+b*b
and
(a-b)^2=a*a-2*a*b+b*b

Answer 3

First: can you define "perfect square trinomial? Second: How do you identify one?

Answer 4

(x+2)^2 = x^2 + 4x + 4 is an example of a "perfect square trinomial."

Answer 5

jaazakallahu kheyr @Er.Mohd.AMIR I got right