Simplify (3x2 - 2) + (5x2 + 5x - 1).

8x^2 + 5x - 3
8x^2 + 5x - 1
2x^2 + 5x - 3
8x^2 + 7x - 1

Not really sure how to solve this? :/

Question

Simplify (3x2 - 2) + (5x2 + 5x - 1).

 8x^2 + 5x - 3
 8x^2 + 5x - 1
 2x^2 + 5x - 3
 8x^2 + 7x - 1

Not really sure how to solve this? :/

cggurumanjunath · Answer

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anonymous · Answer

LOL are we not allowed to give direct answers? I would like to know how to work the problem out :<

texaschic101 · Answer

when adding, the parenthesis are not needed. However, when subtracting, they are needed.
So your problem is : 3x^2 - 2 + 5x^2 + 5x - 1
now we just combine like terms
3x^2 + 5x^2 = 8x^2
5x -- this has no other like term...but do not forget about it
-2-1 = -3
now put it all together
8x^2 + 5x - 3
understand ?

anonymous · Answer

Yes thank you! You made it so simple to understand, almost better than my math book! Medal for you :)

texaschic101 · Answer

thx...glad I could help :)