Question

expand using identity (-3x2y+z)^2

Answer 1

Answer:

Explanation:

(3x - 2y + 5z) ^2

Using identity = (x+y+z)^2 = (x^2+y^2+ z^2 + 2xy + 2yz + 2zx)

= ((3x)^2 + (-2y)^2 + (5z)^2 + 2×3x×-2y + 2×-2y×5z + 2×5z×3x)

= (9x^2 +4y^2 +25z^2 -12xy -20yz +30xz)