Question

Expand The following
(x-2y+3z)²

Answer 1

(x-2y+3z)^2 = x^2 +(-2y)^2 +(3z)^2 +(2×x×_2y) +(2×_2y×3z) +(2×3z×x);;;;; or =x^2+4y^2+9z^2_4xy -12yz+6xz