Question

productos notables:
(3x+y) al cuadrado (3x -y) al cuadrado

Answer 1

$(3x + y)2 = (3x)2 + 2(3x)(y) + (y) 2 = 9x {2} + 6xy + y{2}$

$(3x - y){2} = (3x){2} - 2(3x)(y) + (y) {2} = 9x{2} - 6xy + y{2}$