Question

Help,, I'm asking for a friend XDD 5x³ + 2x² -20x - 8 = 0

Answer 1

The answer is x
=
−
2
5
,
±
2
x=−
​5
​
​2
​​ ,±

Answer 2

Answer:

x=−2 or x= −2/5 or x=2

Explanation:

Let's solve your equation step-by-step.

5x3+2x2−20x−8=0

Step 1: Factor left side of equation.

(x+2)(5x+2)(x−2)=0

Step 2: Set factors equal to 0.

x+2=0 or 5x+2=0 or x−2=0

x=−2 or x=−2/5 or x=2

I have no idea if this is right- I used an equations calculator.