wykonaj redukcje wyrazow podobnych
(3a-b)+(2a+2b)=
(a-c)+(2a+c)-(a-c)=
2.zreduguj i oblicz
dla x=jedna druga
(x(do kwadratu)+3x-5)-(x(do kwadratu)+x-7)=
pomozcie dam naj
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(3a-b)+(2a+2b)=3a-b+2a+2b=5a+b
(a-c)+(2a+c)-(a-c)=a-c+2a+c-a+c=2a+c
x=0,5
(x²+3x-5)-(x²+x-7)=x²+3x-5-x²-x+7=2x+2=2*0,5+2=1+2=3