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Combine like terms.

12.) 7r4 + 13r2 + 9r
13.) 3 - 4x - 15x - 6x - 1

Thanks to whoever helps me :D

  • math -

    in 12.) , if your mean 7x^4 etc, then all 3 terms would be different and nothing else can be done

    13.)
    3-4x - 15x - 6x - 1
    = 2 - 24x , just add up the x terms and the constants.

  • math -

    Thank you so much Reiny :D

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