math

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

how would you solve this???? please help

asked by lisa
  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
    your x terms and your constants.

    Show me your answer and I will check it.

    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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