Question

How do you solve this quadratic equation.
-3x^2+147=0

Answer 1

$-3x^2+147=0\\ -3x^2=-147\\ x^2=49\\ x=-7 \vee x=7$

Answer 2

-3x²+147=0

3x²=147

x²=147/3

x²=49

So:

x=√49=7, or... x=-√49=-7