Have I done the quadratic equation correctly?

  • Thread starter Gringo123
  • Start date
  • #1
Gringo123
141
0
x2 + 3x + 2 = 0

(x + 1) (x + 2)

so x = -1 or -2

Is that right?
 

Answers and Replies

  • #2
Mentallic
Homework Helper
3,802
94
Yes. You can check if you factorized correctly by expanding your factors out.
or... you can check if your answers are correct by substituting them into the quadratic.

If the left-hand side is equal to the right-hand side, then you've found the correct values for x.
 

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