Question

(x + 2y + 3) (x + 2y + 7)
simplify​

Answer 1

Answer:

$(x + 2y + 3) (x + 2y + 7) \\ \ \ x(x + 2y + 7) + 2y(x + 2y + 7) + 3(x + 2y + 7) \\ x ^{2} + 2xy + 7x + 2xy + 4y^{2} + 14y + 3x + 6xy + 21 \\x ^{2} + 12xy + 10x + 14y + 4y ^{2} + 21$