(4x-7y)^2+3(4x-7y)z
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Step-by-step explanation:
(4x -7y)^2+3 (4x-7y)z
(4x-7y){4x-7y+3z}
16x^2-28xy+12xz-28xy+49y^2-21yz
16x^2+49y^2-56xy +12xz-21yz
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