Преобразуйте в многочлен стандартного вида:
1) 2(a - 5)(a + 5)
2) a^2 + (7a - b)^2
3) (a - 3)(a + 3)(a^2 + 9)
1) 2(a - 5)(a + 5)
2) a^2 + (7a - b)^2
3) (a - 3)(a + 3)(a^2 + 9)
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Answers & Comments
2)a²+(7a-b)²=a²+49a²-14ab+b²=50a²-14ab+b²;
3)(a-3)(a+3)(a²+9)=(a²-9)(a²+9)=a⁴-81;