primera tarea del trimestre

1. 5(x-2y) = 5x-10y

3. (x-3)(x+5)= x^2+5x+3x-15= x^2+8x-15

4. x^2-4x+7x-28=x^2+3x-28

5. (x-4)(x-3)= x^2-3x-4x+12=x^2-7x+12

6. -18x^2-24x-6x+8=-18x^2-30+8

7. -4x(2x-3)= -8x^2+12x

8. -18x^2y^3+20y^2

9. (2x+3)(6x^3+4x^2-2x+7)= 12x^4+18x^3+8x^3+12x^2-4x^2-
6x+14x+21=12x^4+26x^3+8x^2-20x+21

10. (4x^2+6x-3)(8x^5+16x^4+63x^3+27x^2-189x-65)=32x^7+64x^6+252x^5+108x^4+756x^3+260x^2+48x^6+96x^5+378x^4+162x^3-1134x^2-390x-24x^5-48x^4-189x^3-81x^2+567x+195=32x^7+112x^6+324x^5+438x^4+729x^3-955x^2+957x+195
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