SOLUTION: I dont know how to use this formula x= -b + or - the square root of b2 -4ac over 2a for this equation y= x2 -25

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Question 631914: I dont know how to use this formula x= -b + or - the square root of b2 -4ac over 2a for this equation y= x2 -25
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Solve equation y = x^2 - 25, using the quadratic formula
a = 1
b = 0
c = -25
x = 0+/-%28sqrt%280+-+4%2A1%2A-25%29%29%2F2 = +/-%28sqrt%28100%29%29%2F2 = +/-10%2F2
Two solutions
x = +5
x = -5