Разложите на множители:
а) 36a4
– 25a2b2;
в)
а3
– 8b3.
б) (x
– 7)2
– 8l;
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Разложите на множители:
а) 36a4
– 25a2b2;
в)
а3
– 8b3.
б) (x
– 7)2
– 8l;
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Verified answer
36а⁴-25а²в²=(6а²-5ав)(6а²+5ав)=а(6а-5в)а(6а+5в)=а²(6а-5в)(6а+5в)(х-7)²-81=(х-7-9)(х-7+9)=(х-16)(х+2)
а³-8в³=(а-2в)(а²+2ав+4в²)