Question

write the expansion:
(9x-2y-3z)²​

Answer 1

Answer:

9x²+2y²+3z²+2(-18xy+6yz-27xz)

81x²+4y²+9z²-36xy+12yz-54xz

Answer 2

$(9x - 2y - 3 {z})^{2} \\ 9 {x}^{2} + ( - 2y) ^{2} + ( - 3z)^{2} + 2 \times 9x \times ( - 3)z + 2 \times ( - 2)y \times ( - 3)z \\ {81x}^{2} + 4 {y}^{2} + 9 {z}^{2} - 36xy - 54xz + 12yz \\ \\ \\ \\ \huge \: thank \: you$