answersLogoWhite

0


Best Answer

x3 + 7x = 8x2

x3 + 7x - 8x2 = 0 [subtract 8x2 from both sides]

x(x2 + 7 - 8x) = 0 [factor out x]

x(x-1)(x-7) = 0 [factor]

Since the product of the three factors x, x-1, and x-7 equals zero, any of the three expressions could equal zero:

x = 0

x - 1 = 0, x = 1

x - 7 = 0, x = 7

Therefore, there are three solutions to the equation x3 + 7x = 8x2:

  1. x = 0
  2. x = 1
  3. x = 7

Or, in set notation: x = {0,1,7}

User Avatar

Wiki User

13y ago

Still curious? Ask our experts.

Chat with our AI personalities

BlakeBlake
As your older brother, I've been where you are—maybe not exactly, but close enough.
Chat with Blake
BeauBeau
You're doing better than you think!
Chat with Beau
RafaRafa
There's no fun in playing it safe. Why not try something a little unhinged?
Chat with Rafa

Add your answer:

Earn +20 pts
Q: Solve x3 plus 7x equals 8x2?
Write your answer...
Submit
Still have questions?
magnify glass
imp