Question

Don't spam.......give step by step solution......​

Answer 1

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

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

=. 4x^2 + 9 y^2 +4z^2 -12xy +12yz+ 8zx

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