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OpenStudy (anonymous):
(-4x^2+3xY-Y^2)(-7x^2-xy+6Y^2)(x^2+4xY-2y^2) = -4x^2+3xY-Y^2-7x^2-xy+6Y^2+x^2+4xY-2y^2 = -4x^2-7x^2+x^2+3xY-xy+4xY-Y^2+6Y^2-2y^2 First of all I removed the brackets then combined the similar terms... now you just have to add the terms having same powers of x
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OpenStudy (anonymous):
Don't the parentheses imply multiplication?
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