Question

Expand using identity (x-y+3z)square whole square pls answer

Answer 1

Answer:

(x-y+3z)²

Ans.

Identity used=(a+b+c)²=a²+b²+c²+2ab+2bc+2ac

Then,

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

=x²+y²+9z²-2xy-6yz+6xz