Question

(x-3y-z)^2 factorize​

Answer 1

Answer:

x²+9y²+z²-6xy+6yz-2zx

step by step explanation:

(x²-3y-z)²

Using identity, (a-b-c) = a²+b²+c²-2ab+2bc-2ca

Here,a=x²

b=3y

c=z

(x²-3y-z)²

{(x²)+(-3y)²+(-z)²}

=x²+9y²+z²-2×X×3y+2×3y×z-2×z×X

=x²+9y²+z²-6xy+6yz-2zx