Упростите выражения
1. (a-4)(a+4)
2.(5x+y)(y-5x)
3.(1-xᶟ)(xᶟ+1)
Разложите на множители
1. 49-x(в квадрате)=
2.-0.01a( в квадрате)+b(в квадрате)=
3. 9-a(в четвертой степени)=
Решите уравнение
(x+2)(x-2)-x(x-3)=0
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