Question

Quanto é
A= (x+3+2y) elevado a 2
B= (3x-y+4) elevado a 2

Answer 1

A)

$(x+3+2y)^{2} \\\\=\left(x+2y+3\right)\left(x+2y+3\right)\\\\=4xy+x^2+6x+12y+4y^2+9$

B)

$(3x-y+4)^{2} \\\\=\left(3x+4-y\right)\left(3x+4-y\right)\\\\=-6xy+9x^2+24x+y^2-8y+16$