Posted by Lynn on Tuesday, December 13, 2011 at 11:11am.
Remember that (a-b)^2 = a^2 - 2ab + b^2
So, if you have x^2 - 6x you need half of the 6 to complete the square:
x^2 - 6x + 9 - 9 + 3 = 0
(x-3)^2 - 6 = 0
(x-3)^2 = 6
So, you can see that
x-3 = ±√6
so,
x = 3 ± √6
Related Questions
Math - Solve each of the following quadratic equations by completing the aquare...
Precalc - use completing the square to describe the graph of each function. How ...
Algebra help - f(x)=x^3-4x^2-x+4 How do I find the x-intercept for this? This is...
Math - Express this function in vertex form by completing the square: 3x^2 - 4x...
pre algebra - solve the equation step by step.list each step along with the ...
math,help,algebra I - I need help can someone help me get unstuck and let me ...
Algebra - Can you give a step by step example of how to factor a perfect square ...
Intermediate Algebra - Solve by completing the square: x^2-6x+3=0 show steps ...
algebra 1 - ELEMENTARY ALGEBRA #3 Page 23 Chapter 3 Lesson 3.02 Solving Multi-...
Algebra - Solving inequalities with both multiplication and addition 4(x-3)-2&...
For Further Reading
