how to expand (-2x+3y+2z)²?
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4x^2 + 9y^2 + 4z^2 - 12xy + 12yz - 8zx
Step-by-step explanation:
(A+B+C)^2 = A^2 + B^2 + C^2 + 2AB + 2BC +2CA
here, A= -2x; B= 3y; C= 2z
therefore
4x^2 + 9y^2 + 4z^2 - 12xy + 12yz - 8zx
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