Выполните умножение двучленов:

1) (m-3)(m+3)=

2) (c-7)(c+7)=

3) ( 4+5a)(5a-4)=

4) (7x-2)(7x+2)=

5) (8b+5a)(5a-8b)=

6) (10p-6q)(10p+6q)=

1

Ответы и объяснения

2013-01-17T16:10:35+00:00

1) (m-3)(m+3)=m2+3m-3m-9=m2-9

2) (c-7)(c+7)=c2+7c-7c-49=c2-49

3) (4+5a)(5a-4)=(5a+4)(5a-4)=25a2-16

4) (7x-2)(7x+2)=49x2-4

5) (8b+5a)(5a-8b)=(5a+8b)(5a-8b)=25a2-64b2

6)(10p-6q)(10p+6q)=100p2-36q2