kurangkan lah b.2xkuadrat +15x-18 dari 11xkuadrat -17x+24 d.-8p+10q-9r dari 4p-11q-9r

b.11x²-17x+24- 2x²+15x-18
=(11x²-2x²)-(17x+15x)+(24-18)
=9x²-32x+6
d. (4p-11q-9r)-(-8p+10q-9r)
=4p-11q-9r+8p-10q+9r
=(4p+8p)-(11q-10q)-(9r+9r)
=12p-q-18r
=12p-q-18r