Question

Expand (-3x+5y-2z)2 using suitable identity

Answer 1

Answer:

• Hope it may be help you......

Explanation:

(3x-5y-2z)^2= (a-b-c)^2 = a^2+b^2+c^2+

2(ab+bc+ca)

2(ab+bc+ca)=(3x)^2-(5y)^2-(2z)^2+2{(3x)(-5y)+(-5y)(-2z)+(-2z)(3x)]

=9x^2+25y^2+4z^2-30xy+20yz-12zx