Question

Wykonaj mnożenia zredukuj wyrazy podobne :
(7b+3)(2-4b)=
(-3+2d)(2c-6)=
(a+3)(2a-1)+(a+7)(a-5)=
3m(m-4)(5m+2)-m(2m+3)(4-3m)=

Answer 1

14b-28b do kwadratu + 6 - 12 b =
-6c + 18 +4cd - 12
2a do kwadratu + 6a -3 + a do kwadratu - 5a + 12 - 9m = 3 a do kwadratu + a -9 - 9m
3m do kwadratu -12 m + 15 m do kwadratu + 6m - 2m do kwadratu +3m - 4m - 3m do kwadratu = 14m do kwadratu = 7m
chyba jezeli blad bedzie to poprawe