.
There is NO real solutions.
Because the square of a real number is always POSITIVE (non-negative) number.
But if you want to apply the quadratic formula, then first calculate the discriminant of the equivalent quadratic equation
in standard form:
= 0. ( = 0 )
The discriminant is equal to
d = = = -300.
The disciminant is negative, which says that the equation HAS NO real solutions.
On solving quadratic equations see the lessons
- Introduction into Quadratic Equations
- PROOF of quadratic formula by completing the square
- HOW TO solve quadratic equation by completing the square - Learning by examples
- Solving quadratic equations without quadratic formula
- Who is who in quadratic equations
Also, you have this free of charge online textbook in ALGEBRA-I in this site
- ALGEBRA-I - YOUR ONLINE TEXTBOOK.
The referred lessons are the part of this textbook under the topic "Quadratic equations".