Question

1)(m-n)(m+3)
2) (4+5a(5a-4)
3) (8b+5a)(5a-8b)
4) (c-7)(c+7)
5) (7x-2)(7x+2)
6) (10p-6q)(10p+6q).

Answer 1

1) м^2-мп+3м-3п;
2) (5а+4)(5а-4)= 25а^2-16;
3) (5а+8в)(5а-8в)= 25а^2-64в^2;
4) (с-7)(с+7)= с^2-49;
5) (7х-2)(7х+2)= 49х^2-4;
6) (10р-6д)(10р+6д)=100р^2-36д^2.