Multiplying Polynomials Practice AK

1. $$\eqalign{24x^4-36x^3-40x^2+42x^3-63x^2-70x=\\\mathbf{24x^4+6x^3-103x^2-70x}}$$

2. $$\eqalign{2x^5-2x^4-2x^3+x^3-x^2-x=\\\mathbf{2x^5-2x^4-x^3-x^2-x}}$$

3. $$\eqalign{-2x^4-x^2y+3x^2+15y^2+9y+14x^3-35xy-21x=\\\mathbf{-2x^4+14x^3+3x^2+15y^2+-x^2y-35xy-21x+9y}}$$

4. $$\eqalign{x^6-x^4y-9x^4+3x^3-3xy-27x-4x^2+4y+36=\\\mathbf{x^6-9x^4-x^4y+3x^3-4x^2-3xy-27x+4y+36}}$$

5. $$\eqalign{-8x^4-36x^3+20x-14x^3-63x^2+35=\\\mathbf{-8x^4-50x^3-63x^2+20x+35}}$$

6. $$\eqalign{9x^4+12x^3+21x^3+28x^2+24x^2+32x+12x+16=\\\mathbf{9x^4+33x^3+52x^2+44x+16}}$$

7. $$\eqalign{-x^4-2x^3-12x^2-7x^2z-14xz-84z+8x^2+16x+96=\\\mathbf{-x^4-2x^3-4x^2-7x^2z+16x-14xz-84z+96}}$$

8. $$\eqalign{-15x^4-10x^3-25x^2+15x^3+10x^2+25x=\\\mathbf{-15x^4+5x^3-15x^2+25x}}$$

9. $$\eqalign{-3x^4+3x^2y+30x^3-7x^2y^2+7y^3+70xy^2=\\\mathbf{-3x^4+30x^3-7x^2y^2+3x^2y+7y^3+70xy^2}}$$

10. $$\eqalign{16x^4+4x^3+4x^2+4x^3+x^2+x+4x^2+x+1=\\\mathbf{16x^4+8x^3+9x^2+2x+1}}$$

11. $$\eqalign{x^7+x^6+3x^5+7x^5+7x^4+21x^3=\\\mathbf{x^7+x^6+10x^5+7x^4+21x^3}}$$

12. $$\eqalign{-x^2-xy-xz-xy-y^2-yz-xz-yz-z^2=\\\mathbf{-x^2-2xy-2xz-y^2-2yz-z^2}}$$