Respostas

2013-04-23T11:17:55-03:00

a) (5ab – 3c + 4d) - (-2d + 3c – 4ab)=

5ab -3c + 4d + 2d -3c + 4ab =

5ab + 4ab - 3c - 3c + 4d + 2d =

9ab -6x + 6d =

 

b) (3x^2-4x-3).(x+1)=

3x^3 + 3x^2 - 4x^2 - 4x -3x -3=

3x^3 + x^2(3-4) - x(4-3) -3 =

3x^3 - x^2 -x - 3=

 

c) \frac{(3x4-6x3+10x2)}{(-2x2)}=

\frac{3x^4}{-2x^2} - \frac{-6x^3}{-2x^2} - \frac{10x^2}{-2x^2}=

\frac{-3x^2}{2} + 3x - 5=

 

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