# math

what is the sum of (x^2-3x+2) and (5x^2-3x-8)?

1. You have to combine like terms.

When you add you keep the variable(letter) with its exponent and and the coefficients (numbers in front)

3x + 5x = 8x

You are going to combine your x^2 terms

posted by JJ
2. so would it be

7x^2-6??

posted by lisa
3. -3x -3x = -6x
this is the same as -3x + -3x + -6x
You are right, but missing the middle term.

-3x + 3x = 0 that isn't what you had here.

posted by JJ
4. oh because i thought it was a negative and a positive so they cancel out

but its 7x^2-6x-6? or...?

posted by lisa
5. Correct. You have to be careful with the signs.

posted by JJ
6. Thank you c:

posted by lisa
7. You are welcome.

posted by JJ

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