Question

Efetue: A= (x+y)^2 ; B= (a+3)^2 ; C= (5x+2) ; D= (-3+4x)^2

Answer 1

a=x^2+2xy+y^2
b=a^2+6a+9
c=5x+2 oras
d=9-24x+16x^2
16x^2=(4x)^2