Simplify. (a) ( ax²+ bx +c) ( 3x- 7- 5y)
(b) (3x + 7y) (4x-5y) + ( 3y+7z) ( 4x-5z).
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Answer:
a) 3ax³-7ax²-5ax²y+3bx²-7bx-5bxy+3cx-7c-5cy
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