SOLUTION: Solve for the root(s) of Sqrt(x^2+7)= -sqrt(2)x+1

Algebra ->  Square-cubic-other-roots -> SOLUTION: Solve for the root(s) of Sqrt(x^2+7)= -sqrt(2)x+1      Log On


   

Question 752741: Solve for the root(s) of Sqrt(x^2+7)= -sqrt(2)x+1
Answer by malglu(63) About Me  (Show Source):
You can put this solution on YOUR website!
square both sides and yo get
x^2 +7 = -(2x+1)
multiply out and move all terms over to one side
x^2 +2x +8 = 0
use the formula to get the roots
-1 + or - sqrt -7 all divided by 2
sqrt -7 is all kown as i sqrt 7