Try another version of this question Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Add the 2 polynomials:
`(-10x^4+6x^3+9x) + (-8x^4-x^3+10)`
Be sure your variables match those in the question `-18x^4+5x^3+9x+10`