Question

(2x - 3y)² eu costaria de resolve essa ecuacao

Answer 1

$(2x - 3y)^2= (2x - 3y)(2x - 3y) \\ \\ (2x - 3y)^2= (2x)^2+2x*(-3y)-3y*(2x) +(-3y)^2 \\ \\ (2x - 3y)^2= 4x^2-6xy-6yx +9y^2 \\ \\ (2x - 3y)^2= 4x^2-12xy+9y^2$