Register
Find all roots of the equation x^3 - 5x^2 + 2x +8=0 PLEASE SHOW WORK IF YOU CAN THANK YOU!!
249,213 views
33 votes
33 votes
Find all roots of the equation x^3 - 5x^2 + 2x +8=0 PLEASE SHOW WORK IF YOU CAN THANK YOU!!

User BoeseB
by
2.8k points

1 Answer

21 votes
21 votes
Answer: x = -1, 2, or 4


-1^3 - 5(-1)^2 + 2*-1 + 8
-1 - 5 - 2 + 8 = 0

2^3 - 5(2)^2 + 2*2 + 8
8 - 20 + 4 + 8 = 0

4^3 - 5(4)^2 + 2*4 + 8
64 - 80 + 8 + 8 = 0
User Scoobler
by
2.8k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

1.6m questions

2.0m answers

Other Questions

Can anybody tell me what’s going on here?
Granola costs $1.76 per pound. Write and solve an equation to determine the number of pounds p of granola that can be purchased with $7.04. The equation is: The value of x is
Evalute 8a -1+0.5b when a =1/4 and b= 10 how dose this work i need help..
PLZ needed now plz URGENT!
HELP PLEASE, I NEED THE ANSWER QUICKLY
Link Copied!