Answer:
1.-8x2-17x
2.6x2+13x-6
3.10x2-10xy-20y2
4.7-14x+2x2
5.4x3-3x3-11x2+4x
Step-by-step explanation:
1.(-3x2-8x+2)+(-5x2-9x-2)
=-8x2-17x
2.(-2x2+7x-1)-(8x2-6x+5)
=-2x2+7x-1-(8x2+6x-5)
=6x2+13x-6
3.(5x2-5xy-10y2)+(5x2+5xy+10y2)
=10x2-10xy-20y2
4.(2+8x+4x2)-(9+6x-2x2)
=(2+8x+4x2)-(9-6x+2x2)
=7-14x+2x2
5.(4x3+5x2+3x)-(3x3+6x2-1)
=(4x3+5x2+3x)-(3x3-6x2+1)
=4x3-3x3-11x2+4x
CORRECT ME IF WRONG!
