## Help (Solving Quadratic Equations By Completing The Square)

Quadratic equations and inequalities, variation equations, function notation, systems of equations, etc.
xxTony13
Posts: 4
Joined: Sat Sep 10, 2011 12:12 pm
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### Help (Solving Quadratic Equations By Completing The Square)

Hello, I'm Lowell Garcia, a 2nd Year High School Student from the Philippines, our math is all about Intermediate Algebra. The reason why I joined to this forum is that I want to have a high grade in our math subject and I'm having a hard time to understand and to catch up with the math lessons which my teacher is giving. I know you guys that you can help me kindly please .

Anyway the lesson that we are currently studying is about How to solve quadratic equations by completing the square. Our teacher had given us a homework and I'm having a hard time to solve these quadratic equations. Can you please solve them for me and please teach me how did you solve it. Kindly please and Thank You.

Homework:

Solve the following quadratic equations by completing the square:

1) $2x^2$+x-3=0

2) $6y^2$-13y+6=0

3) $2a^2$-5a-3=0

stapel_eliz
Posts: 1731
Joined: Mon Dec 08, 2008 4:22 pm
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xxTony13 wrote:Can you please solve them for me....

Sorry, but this isn't that kind of place.

xxTony13 wrote:...and please teach me how did you solve it.

To learn how to solve by completing the square, please study this lesson.

xxTony13
Posts: 4
Joined: Sat Sep 10, 2011 12:12 pm
Contact:

### Re:

stapel_eliz wrote:
xxTony13 wrote:Can you please solve them for me....

Sorry, but this isn't that kind of place.

xxTony13 wrote:...and please teach me how did you solve it.

To learn how to solve by completing the square, please study this lesson.

I've already solve it and I already found the values of x but I'm having a hard time checking it. We need the checking so we will have the additional points. What should I do?

stapel_eliz
Posts: 1731
Joined: Mon Dec 08, 2008 4:22 pm
Contact:
xxTony13 wrote:I've already solve it and I already found the values of x but I'm having a hard time checking it. We need the checking so we will have the additional points. What should I do?

You do exactly what they showed you for "checking": you plug the answers back into the original equation, and make sure that they work.