2006-09-19 08:51:34 · 4 answers · asked by kwikemartemployee 2 in Education & Reference ➔ Homework Help
Are you talking about solving a quadratic equation by completing the square? If so, here are the steps. We'll use
2x^2 + 8x -12 = 0 as an example. I'm just making the problem up, so I'm not sure how it will turn out.
1. If x^2 has a coefficient other than 1, divide it out.
That gives us x^2 + 4x -6 = 0
2. Move the constant term to the right side: x^2 + 4x =6
3. Take half the coefficient of x, square it, and add it to both sides of the equation: x^2 + 4x + 4 = 6 + 4
4. Factor the left side into two binomials. They should be the same. (x + 2)^2 = 10
Step 4 is why it's called completing the square.
5. Take the square root of both sides: x + 2 = +/- sqrt 10
6. Sove for x: x = -2 +/- sqrt 10
The steps are easy. The problems get more complicated when there are fractions involved. But if you follow the steps you can finish any of them.
2006-09-19 09:00:17 · answer #1 · answered by PatsyBee 4 · 0⤊ 0⤋
im not sure but go to algebra 2.com then go to extra examples and find the chapter and lesson you want : )
hope this helped
2006-09-19 15:56:29 · answer #2 · answered by Thank you 1 · 0⤊ 0⤋
Here's a good explanation.
2006-09-19 16:00:26 · answer #3 · answered by Sheik Yerbouti 4 · 0⤊ 0⤋
by putting the finishing touches on it, of course.
2006-09-19 16:00:40 · answer #4 · answered by imnotbtami 5 · 0⤊ 1⤋