SOLUTION: Solve. help me please ,I want to make sure i"m doing it right. Thank you Find the zeroes of the polynomial. p(x) = 5x4 – 7x3 – 31x2 + 15x + 18

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: Solve. help me please ,I want to make sure i"m doing it right. Thank you Find the zeroes of the polynomial. p(x) = 5x4 – 7x3 – 31x2 + 15x + 18       Log On


   

Question 815329: Solve. help me please ,I want to make sure i"m doing it right.
Thank you
Find the zeroes of the polynomial.
p(x) = 5x4 – 7x3 – 31x2 + 15x + 18
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,



Find the zeroes of the polynomial.

 p(x) = 5x4 – 7x3 – 31x2 + 15x + 18

Using Synthetic Division for roots 1 and 3



1	5	-7	-31	15	18

		5	-2	-33	-18

					

	5	-2	-33	-18	

3		15	 39	 18	

	5	13	6	 0  

(x-1)(x-3)(5x^2+ 13x + 6)    x+=+%28-13+%2B-+sqrt%28+49+%29%29%2F%2810%29+

 Roots are -2, -.6,1,3