Friday

January 30, 2015

January 30, 2015

Posted by **Natasha** on Monday, September 17, 2012 at 11:03pm.

- pre calculus -
**Reiny**, Monday, September 17, 2012 at 11:33pmtry x=1

f(1) = 1+6-11-24+28 = 0

so x-1 is a factor

do synthetic division

(x^4+6x^3-11x^2-24x+28) = (x-1)(x^3 + 7x - 4 - 28)

x^3 + 7x^2 - 4x - 28

= x^2(x+7) - 4(x+7)

= (x+7)(x^ - 4)

so x^4+6x^3-11x^2-24x+28

= (x-1)(x-2)(x+2)(x+7)

x = 1, -2, 2, -7

**Answer this Question**

**Related Questions**

Pre Calculus - find the real zeros of the polynomial: P(x) = 24x^3 - 76x^2 + 2

college algebra - use the rational zeros theorem to find all the real zeros of ...

pre calculus - use the rational zeros theorem to find all the real zeros of the ...

pre-calculus - information is given about the polynomial f(x) whose coefficients...

Pre-Calculus-check answers - Find the number of possible negative real zeros for...

Pre-Calculus-check answers - Find the number of possible negative real zeros for...

Pre-calculus-check answers - Find the number of possible negative real zeros for...

pre-calculus - Find the number of possible negative real zeros for f(x)=6+x^4+2x...

pre calculus - use given info about a polynomial whose coefficients are real ...

calculus - how to find all real zeros of "4x^5+8x^4-15x^3-23x^2+11x+15