Question

binomio cuadrado de
(2x+y)2

Answer 1

(2x+y) 2 = (2x+y)(2x+y) = 4x2 + 2xy + 2xy + y2 = 4x2+4xy+y2

Answer 2

$(2X+Y)^2=4X^2+2(2X)(Y)+Y^2=4X^2+4XY+Y^2$