Answer:
Step-by-step explanation:
15 x^2 - 9 + 4 x - 5 x^2 - 11
by grouping the like terms,
15 x^2 - 5 x^2 + 4x - 9 - 11
10 x^2 + 4x - 20
Hope this helps
plz mark as brainliest!!!!!!
10x^2+4x-20
Subtarct 5x^2 from 15x^2
Subtract 11 from -9
