Thursday

November 27, 2014

November 27, 2014

Posted by **ayrajudelle** on Sunday, July 24, 2011 at 9:48am.

please help me guys. :(

- math -
**MathMate**, Sunday, July 24, 2011 at 10:28amHint:

A cubic has to have at least one zero.

If the expression has rational factors, there would be at least one linear factor fininishing in 1,2,4 or -1,-2,-4, since the coefficient of a^3 is 1.

For f(a)=a^3 - 2a + 4

So check f(1),f(2),... and which factor is in f(a). Do a long division and try to factor the remaining quadratic.

- math -
**MathMate**, Sunday, July 24, 2011 at 10:32amSorry, the last paragraph is not clear.

If f(a0)=0, then (x-a0) is a factor of f(a). So check and see which of f(1),f(2)...=0 and hence find a rational factor of f(a).

If f(-1)=0, then (a+1) is a factor.

Do a long division and factor the remaining quadratic.

**Answer this Question**

**Related Questions**

math - need help again mutliply x(x+1)(x-1) and factor completely 6y^2-2yz and ...

quantum physics - the quantum factor algorithm for N=91 is carried out. What is ...

Math - hi guys! I was wondering how to do x6-18x2+8 divided by factor x2-4 I ...

english - hey people!! im new here and i just got an essay to do on english ...

math ergent please - 3. Factor x^4-3x^3-11x^2+3x+10 completely using the factor ...

Math - Factor Completely: I am really confused on how to start it. 12q^5w^2-36q^...

Hard Geometry Problem - Hi guys. I need a lot of help on this. "Equilateral ...

math - If the sides of a box all double in length, by how much does its volume ...

Using the factor Theorem - use the factor theorem to determine whether x-c is a ...

PLEASE HELP ME WITH MATH! *BEGS* - Is 4a^2-a-5 factorable? If so how do you ...