2. 1) -2,8a*(-5b)=14ab
2) -12a-25b+18a+14b=6a-11b
3) b-(b+6)+(b-18)=-12b
4) -7(m-4)+5(m+2)=-7m+28+5m+10=-2m+38
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Answers & Comments
2. 1) -2,8a*(-5b)=14ab
2) -12a-25b+18a+14b=6a-11b
3) b-(b+6)+(b-18)=-12b
4) -7(m-4)+5(m+2)=-7m+28+5m+10=-2m+38