Pomnóż i oblicz wartość:
-7(2a+3b)-9(a-2b)=
3(a-b)+2(a+b)=
NA JUTRO Z GÓRY DZIĘKI ; **
-7(2a+3b)-9(a-2b)=-14a-21b-9a+18b =-23a-3b
3(a-b)+2(a+b)=3a-3b+2a+2b=5a-b
-7(2a+3b)-9(a-2b)= -14a-21b-9a+18b = -23a-3b
3(a-b)+2(a+b)= 3a-3b+2a+2b = 5a-b
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-7(2a+3b)-9(a-2b)=-14a-21b-9a+18b =-23a-3b
3(a-b)+2(a+b)=3a-3b+2a+2b=5a-b
-7(2a+3b)-9(a-2b)= -14a-21b-9a+18b = -23a-3b
3(a-b)+2(a+b)= 3a-3b+2a+2b = 5a-b