Answer:
1.) -21 -11x+2x²
2.) -9+9x-5x²+x3
3.) -5x²y²+25x³y³+15x⁴y³-20bx²y⁵
4.) -x-10bxy
hope it helps.
brainliest pls.
lah bat na delite Yung Isa mong question
