Question

solve x^4+2x^3-25x^2-26x+120=0,given that the product of its roots is 8.​

Answer 1

Refer to the above attachment

Answer 2

Answer:

Step-by-step explanation:

0=x^4+2x^3-25x^2-26x+120

0-(((((x4)+(2•(x3)))-52x2)-26x)+120)  = 0

0-(((((x4)+2x3)-52x2)-26x)+120)  = 0

Pull out like factors :

  -x4 - 2x3 + 25x2 + 26x - 120  =  

 -1 • (x4 + 2x3 - 25x2 - 26x + 120)