SOLUTION: please help me slove this question f(x)=x^2+7 i got this but i dont know what to do from here -7+ or - the square root of 85 over 2

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons -> SOLUTION: please help me slove this question f(x)=x^2+7 i got this but i dont know what to do from here -7+ or - the square root of 85 over 2      Log On


   

Question 386417: please help me slove this question f(x)=x^2+7
i got this but i dont know what to do from here -7+ or - the square root of 85 over 2
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
f(x)=x^2+7
x^2 + 7 = 0
x^2 = -7
x = ± isqrt(7) (i = sqrt(-1) )