Tuesday

March 31, 2015

March 31, 2015

Posted by **Linda** on Thursday, January 11, 2007 at 1:13pm.

Solve x^3-3x^2-10x=0 by factoring.

Take out x.

x(x^2-3x-10)=0

For the polynomial inside the parentheses, you want factors of 10 that will add or subtract to give 3. 10 and 1 gives 11 or 9 so that is no good. But 5 and 2 are ok. 5*2=10 and 5-2=3.

x(x+2)(x-5)=0

I assume you can finish. If not repost and tell us exactly what you don't understand about it.

Would your answers be x=-2 and x=5?

Yes, but there is another answer too. Isn't x=0 (from first x) factored out?

Oh, yes! I was wondering if you do anything with that. Thank you.

**Answer this Question**

**Related Questions**

Algebra. - Help? -Solve Polynomial Equations By factoring. 1. x^6-25x^4=0 2. y^3...

Algebra. - Help? -Solve Polynomial Equations By factoring. 1. x^6-25x^4=0 2. y^3...

Algebra - Could someone please help me find x in this problem and explain how ...

Math Please Help me!!! - 3x^2+17x+10 *You have to factor completley but I don't ...

Algebra - Can someone describe the strategy for factoring a polynomial? Please ...

Pre-algebra - Solve. 29x – 2(9x – 0.455) = 10x + 0.525 Give us you thinking on ...

math,factoring,help - Can someone please show me step by step how to do these. I...

algebra - Can someone please help me with the following?: Factor each expression...

math,correction - can someone check these for me please.... problem#4 Directions...

Factoring Polynomial - I need help on this 12(p+3)>2+ 13(p+3)+3 multiply out...