Combine like terms.

Question

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

Thanks to whoever helps me :D

Answer 1

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.

Answer 2

Thank you so much Reiny :D