Question

The roots of the cubic equation x3+7x2-21x-21=0​

Answer 1

Answer:

Changes made to your input should not affect the solution:

(1): "x2" was replaced by "x^2". 1 more similar replacement(s).

Step by step solution :

STEP

1

:

Equation at the end of step 1

(((x3) - 7x2) - 65x) + 231 = 0

STEP

2

:

Checking for a perfect cube

2.1 x3-7x2-65x+231 is not a perfect cube

Trying to factor by pulling out :

2.2 Factoring: x3-7x2-65x+231