5ª TaRea AlgEbRa 1- 5

MULTIPLICACIÓN Y DIVISIÓN

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

2. (x^2+2x)= 3x^6+6x5y

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

4. (x+7)(x-4)= x-4x+7x-28
=x^2-3x-28
5. (x-4)(x-3)= x^2-3x-4x+12
=x^2-7x+12
6. (3x-4)(6x-2)= 18x^2-6x-24x+8
=18x^2-30x+8
7. -4x(2x-3)= -8x^2+12x

8. (3x^2-4y)(-5y^3)= -15x^2y^3+20y^4

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. (9x^2+6x-3)(8x^5+16x^4+63x^4+63x^3+27x^2-189x-65)= 72x^7+48x^6+14x^6+567x^6-24x^5+96x^5+378x^5+567x^5-48x^4-189x^4+378x^4+243x^4-189x^3+162x^3-170x^3-81x^2-1134^2-585x^2-567x-390x+195 = 72x^7+759x^66+1017x^5+384x^4-1728x^3-1800x^2-957x+195


2) divisiones:

1. -18^3/9x= -2x^2

2. -3x^5/-2x^2= 1.5x^3

3. 3x^2-6xy-12x^2/3x= x-2y-4x

4. -4x^9+6x^2+32x/-2x= 2x^8-3x-16

5. 17x^4/3x^3= 5.6x

6. 628x^2zy/12x^2= 52.3xz

7. 256z^6/8z^2= 32z^4

8. 625x^3y^2z/5yz= 125x^3y