Q8. Subtract: 4x ( x + y +z) - 2y ( x-y+z) from 3z ( -x + y + z).
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Step-by-step explanation:
= -3zx +3zy + 3z^2 - 4x^2 -4xy - 4xz + 2xy - 2y^2 + 2yz
= -4x^2 - 2y^2 + 3z^2 - 2xy + 5yz - 7xz
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