Friday

December 19, 2014

December 19, 2014

Posted by **ted** on Thursday, July 5, 2012 at 4:50pm.

pls help

- math -
**Reiny**, Thursday, July 5, 2012 at 6:24pmlet f(x) = x^3 + 5x^2 - 28x - 32

I tried x = ±1, ±2, ±4 (that is, factors of 32)

on the second try, I found f(-1) = 0

so x+1) is a factor

Using synthetic division I found

x^3 + 5x^2 - 28x - 32 = (x+1)(x^2 + 4x -32) which factored again to

(x+1)(x+8)(x-4)

**Answer this Question**

**Related Questions**

hard math - please someone help me! i've tried so hard! factor m^6 + n^2 28x^2y^...

Algebra - Factor the numerator and denominator of each fraction if neceesary. ...

Math - How do I find a factor of x^3 - 3x^2 - 28x?

math - how do u factor 7x^3+28x^2-35x ? thanx.

Math - Andrew factored the expression 28x^3-42x^2+35x as 7x(4x^2+6x-5). But when...

Math for college readiness - Find the greatest common factor of these two ...

Intermidia Algebra - Andrew factored the expression -12x^3-28x^2-3x as -4x (3x^2...

Algebra - Factor 4xy+28x+y+7

algebra - Andrew factored the expression 28x©ø-6x©÷-10x as 2x(14x©ø-3x©÷-5x) . ...

Algebra - Andrew factored the expression 28x^3-42x^2+35x as 7x(4x^2+6x-5). But ...