Question

Hey mates, good evening
expand using identities

all the bst !

Answer 1

Answer:

x²+4y²+9z²-4xy-6xz+12yz

Step-by-step explanation:

(a-b-c)²

=a²+b²+c²-2ab-2ac+2bc

Using the identity we get-

(x-2y-3z)²

=x²+4y²+9z²-4xy-6xz+12yz

Answer 2

Answer :-

=) (x - 2y - 3z)^2

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

=) x^2 + 4y^2 + 9z^2 - 4xy + 12yz - 6zx.