Question

find the following products using approprite identities: (x+3)(x+3)

Answer 1

using (a+b)²=a²+2ab+b²

a=x, b=3

x²+2(X)(3)+(3)²

x²+6x+9

Answer 2

Use (x+3)^2
=x^2+3^2+2*x*3
=x^2+9+6x