Предмет: Алгебра, автор: Алладам

Решить задания от 1-3 пожалуйста :3

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Автор ответа: tanyshik607

1. а)а²-4-10а+2а²=3а²-10а-4
б) у²-18у+81-3у²-3у=-2у²-21у+81
в)3(х²-8х+16)-3х²=3х²-24х+48-3х²=-24х+48
2. а)х(5-х)*(5+х)
б)2(х²-10ху+25у)=2(х-5у)² я думаю что в задании опечатка там должно быть 50у
3. с⁴-2вс²+в²-с⁴+1+2вс²=в²+1, если в=-3, то (-3)²+1=10

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