Question

expand using suitable idenlity (3x-2y-4z)^2​

Answer 1

Answer:

(3x-2y-4z)^2 = (3x)^2+(-2y)^2+(-4z)^2+2×3x×-2y+2×-2y×-4z+2×-4z×3x

= 9x^2 + 4y^2 + 16z^2 - 12xy + 16yz - 24xz

Answer 2

Answer:

The answer is below

Step-by-step explanation:

(a+b+c)²= a²+b²+c²+2ab+2bc+2ca

= (3x)²+(-2y)²+(-4z)²+2(3x)×(-2y)+2(-2y)×(-4z)+2(-4z)(3x)

= 9x²+4y²+16z²-12xy+16yz-24zx.