Question

Solve for x as if x was a positive number.
x^2 + x = 6

I got 3 or -3 as an answer, but I don't trust myself!

Answer 1

3^2 + 3 is 12 not 6

2^2 + 2 is 6 however.

And since you need a positive answer, you don't need to work out any negative examples.

Answer 2

x^2+x-6=0

Answer 3

x^2+3x-2x+6=0
x(x+3)-2(x+3)=0
(x-2)(x+3)=0
x=2,x=-3

Answer 4

solving x give us 2 and -3