(х-4)*(х-2)= х²-6х+8
(3х+1)*(5у-6)= 15ху+5у-18х-6
(3у-2с)*(у+6с)= 3у²+16ус-12с²
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(х-4)*(х-2)= х²-6х+8
(3х+1)*(5у-6)= 15ху+5у-18х-6
(3у-2с)*(у+6с)= 3у²+16ус-12с²