Asked by R
Solve 5x^3 – 6x^2 – 4x – 8 = 0
Answers
Answered by
Reiny
first try some factors of 8
after 2 attempt I found x = 2 works
so x-2 is a factor
by synthetic division ....
5x^3 – 6x^2 – 4x – 8
= (x-2)(5x^2 + 4x + 4)
now solve 5x^2 + 4x + 4 = 0
Use the formula, you will get two complex roots
after 2 attempt I found x = 2 works
so x-2 is a factor
by synthetic division ....
5x^3 – 6x^2 – 4x – 8
= (x-2)(5x^2 + 4x + 4)
now solve 5x^2 + 4x + 4 = 0
Use the formula, you will get two complex roots
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