64x^3 = 1
x^3 = 1 :64
х=1:4
1. (2a-7)(3-a)= 6a-2a^2-21+7a= 13a-2a^2-21= -2a^2+13a-21
2. (3a-b)(5b-a)=15ab-3a^2-5b^2+ab= 16ab-3a^2-5b^2
3. <span>4a * (a -b) - (a + b)* ( 4a - b)= -7ab+b^2
4. </span><span>(3a - 2)* (a+ 3) + (a-4) * (1 - 3a)= 20a-10</span>
A²(b+a)-4b²(b+a)=(b+a)(a²-4b²)
Решение во вложении
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