SOLUTION: Find the zeros of the polynomial function F(x)=x^3+4x^2-9x-36

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Find the zeros of the polynomial function F(x)=x^3+4x^2-9x-36      Log On


   

Question 920140: Find the zeros of the polynomial function
F(x)=x^3+4x^2-9x-36
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

F(x)=x^3+4x^2-9x-36  (x = 3 is a root)

Using Synthetic Division

3	1	4	-9	-36

		3	21	36

	1	7	12	0

(x-3)(x^2 + 7x + 12)

(x-3)(x+3)(x+4) =  0

Zeros are: -4,-3, 3