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(3a2 + 2a - 2) - (a2 - 3a + 7)
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(3a2 + 2a - 2) - (a2 - 3a + 7)

User Iftikhar Ali Ansari
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1 Answer

3 votes
remember to distribute invibile -1
simlify 2nd part
-(a^2-3a+7)=-1(a^2-3a+7)=-a^2+3a-7

now we have
3a^2+2a-2-a^2+3a-7=
3a^2-a^2+2a+3a-2-7=
2a^2+5a-9
User Edward Comeau
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