SOLUTION: Hello out there. Can someone help me and my son solve this equation? They are asking for the "real solutions" to {{{x^3-13x=12}}}. Please and much thanks. It's been a long

Question 119560: Hello out there.
Can someone help me and my son solve this equation? They are asking for the "real solutions" to .
Please and much thanks. It's been a long time since I had to remember this stuff :-)
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
subtracting 12 gives x^3-13x-12=0 __ substituting -1 for x satisfies the equation, so x+1 is a factor

dividing x^3-13x-12 by x+1 gives x^2-x-12, which factors into (x-4) and (x+3)

so x^3-13x-12=0 factors into (x+1)(x+3)(x-4)=0

setting each of the factors equal to zero, gives the "real" values of x __ -1, -3, 4
RELATED QUESTIONS
hello. Can someone please help me solve this equation, i do not understand how to work it (answered by Alan3354)

Please help me solve this, this is my problem my home work is asking me to. With out... (answered by stanbon)

Hello, I just want to doublecheck my answers if someone can help me. Solve the... (answered by jim_thompson5910,Alan3354,edjones)

Please help me answer the followig question. They are asking for the domain of the... (answered by jim_thompson5910)

Can you help me solve this equation for real solutions?... (answered by stanbon)

Determine the nature of the solutions of the equation. y^2 = 3/2y + 2/7 a. 1 real... (answered by stanbon)

I am trying to help my son with his homework, and it might as well be in a foreign... (answered by colliefan)

Hello, Can someone help me with the following: 1. write a quadratic equation having (answered by Alan3354)

I'm trying to solve the following equation for x to three significant places, however,... (answered by Fombitz)