n4ikusbambergur n4ikusbambergur
  • 21-11-2016
  • Mathematics
contestada

Which of the following expressions is this one equivalent to?
(x^4+2x^3-x-2)÷(x^3-1)

A. 2x-5- (3/x^3-1)
B. x^2+x+1
C. x+2
D. x^2+3x+2
...?

Respuesta :

JcAlmighty
JcAlmighty JcAlmighty
  • 22-11-2016
The answer is C. x+2.


[tex] \frac{ x^{4} +2 x^{3}-x-2 }{x^{3} -1} [/tex]

Rearrange it:
[tex]\frac{ x^{4} +2 x^{3}-x-2 }{x^{3} -1}=\frac{ x^{4} -x+2 x^{3}-2 }{x^{3} -1} =\frac{ x*x^{3} -x*1+2*x^{3}-2*1 }{x^{3} -1}= \frac{x( x^{3}-1)+2(x^{3}-1) }{x^{3}-1} = \\ = \frac{(x^{3}-1)(x+2)}{x^{3}-1} [/tex]

x³ - 1 can be cancelled out:
[tex]\frac{(x^{3}-1)(x+2)}{x^{3}-1} = x+2[/tex]
Answer Link
Ashleysantana1229 Ashleysantana1229
  • 05-03-2021

Answer: x+2. The answer is C.

Step-by-step explanation:

Answer Link

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