3к³-81=3(к³-27)=3(к-3)(к²+3к+9)
у²-8у+16-3ху+12х=(у-4)²-3х(у-4)=(у-4)(у-4-3х)
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3к³-81=3(к³-27)=3(к-3)(к²+3к+9)
у²-8у+16-3ху+12х=(у-4)²-3х(у-4)=(у-4)(у-4-3х)