Question

factorise
(-2x +3y -5z )^2
please help me ​

Answer 1

Answer:

Using identity

(a+b+c)²= a²+b²+c²+2ab+2bc+2ac

= (2x)²+(3y)²+(-5z)²+2(2x)(3y)+ 2(3y)(-5z)+2(-5z)(2x)

=4x²+9y²+25z²+12xy-30yz-20xz