Раскройте скобки: 1) 5x^3(x^2-1) 2) (a+b)(a^2-ab+3b^2) 3) (6n-p)(6n+p)

Question

Раскройте скобки:
1) 5x^3(x^2-1)
2) (a+b)(a^2-ab+3b^2)
3) (6n-p)(6n+p)

Answer 1

= 5x^5-5x³   2)=a³-a²b+3ab²+a²b-ab²+3b³=a³+2ab²+3b³
 3)=(6n)²-p²=36n²-p²