Wykonaj mnożenie i zredukuj wyrazy podobne. poomozecie ; p a) c(b+3)+c b) b(b-4)+3b c)2a(a-2b+5) d) b(b-5)-(b+5) e) -(a-3b)-5(a-2b+5)
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a) c(b+3)+c = bc+3c+c = 4c+bc
b) b(b-4)+3b = b^2-4b+3b = b^2 -b
c)2a(a-2b+5)= 2a^2-4ab+10a
d) b(b-5)-(b+5)= b^2-5b-b-5=b^2-6b-5
e) -(a-3b)-5(a-2b+5)= -a+3b-5a+10b-25= -6a+13b-25