Question

Solve the equation by completing the square. Round to the nearest hundredth if necessary. x2 – x = 25

Answer 1

5.52, –4.52

is the correct answer,never forget negatives!

Answer 2

x^2 - x = 25
Add c in both side
c = (b/2a)^2 = (1/2)^2 = 1/4
x^2 - x + 1/4 = 25 + 1/4
(x - 1/2)^2 = 101/4
(x - 1/2) = √101/4
x - 1/2 = 5.02
x = 5.52 &
x = 4.52