Question

by using algebraic identities solve this problem - 2 X + 3 Y - 7 Z Square​

Answer 1

Step-by-step explanation:

the identity used

(a+b+c)^2 = a^2 +b^2 +c^2 + 2ab+ 2bc+2 ac

(-2x+3y-7z)^2 = 4x^2 +9y^2 + 49z^2 - 12xy -42yz + 28xz