SOLUTION: I don't understand these Please help Thanks, Solve by completing the square 1. x^2 - 6x = 16 I get (6/2)^2 = 9/4 = (x-9/4)^2 then I am lost. 2. 2x^2 - 3x + 1 = 0 I get a

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: I don't understand these Please help Thanks, Solve by completing the square 1. x^2 - 6x = 16 I get (6/2)^2 = 9/4 = (x-9/4)^2 then I am lost. 2. 2x^2 - 3x + 1 = 0 I get a      Log On


   

Question 203051This question is from textbook
: I don't understand these Please help Thanks,
Solve by completing the square
1. x^2 - 6x = 16
I get (6/2)^2 = 9/4 = (x-9/4)^2 then I am lost.
2. 2x^2 - 3x + 1 = 0 I get as far as
2^2 - 3x =1
x^2 3/2 = 1/2
x^2 9/4 = 1/2 Now I am lost
3. x^2 - x - 1 = 0 Is this just {1,-1}


This question is from textbook

Answer by KY(1) About Me  (Show Source):
You can put this solution on YOUR website!
X^2 - 6X = 16
Complete the square in the left
X^2 - 6X + 9 - 9 = 16
(X-3)^2 - 9 = 16
(X-3)^2 = 25
(X-3)^2 = 5^2
so
X-3 = 5 ===> X = 8
or
X-3 = -5 ===> X = -2
Answer : X = -2 or 8