Question

(X+y)^2 por favor me ajudem

Answer 1

${(x + y)}^{2} = {x}^{2} + 2xy + {y}^{2} \\ ou \\ {(x + y)}^{2} = (x + y)(x + y) = x \times x + x \times y + y \times x + y \times y = {x}^{2} + 2xy + {y}^{2}$