## Ghatiii Group Title Solve: x2 - 20x + 36 = 0 one year ago one year ago

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1. Callisto Group Title

x^2 - 20x +36 = 0 x^2 -2x - 18x +36 = 0 x(x-2) -18(x-2) = 0 (x-2)(x-18) = 0 x-2 = 0 or x-18 = 0 <-solve these equations

2. MathLegend Group Title

Shouldn't you have walked her through from the beginning?

3. Callisto Group Title

To solve quadratic equations, you can do it like the above, that is factoring the expression on the left, put each factor = 0 and solve them OR Use quadratic formula.

4. MathLegend Group Title

You basically just gave out the answer.

5. Callisto Group Title

@MathLegend Did I? Where's the answer?

6. MathLegend Group Title

I said you basically did if you can read.

7. Callisto Group Title

The only mistake that I made here was not explain with words But basically, I did show the asker the way to work the answer out.

8. MathLegend Group Title

Yes, but my point is.. since she posted this. Don't you think she may need some explanation along the way?

9. MathLegend Group Title

Liek as you go from Step 1 to Step 2

10. MathLegend Group Title

Like*

11. Callisto Group Title

If that's what you want, x^2 - 20x +36 = 0 Split the middle term so that you can factor the expression easier x^2 -2x - 18x +36 = 0 Take out the common factor for the first two terms and last two terms x(x-2) -18(x-2) = 0 Take out the common factor again (x-2)(x-18) = 0 Put each factor = 0 x-2 = 0 or x-18 = 0 solve these equations on your own

12. MathLegend Group Title

Okay, I am just saying because a Mod told me that when I first joined.

13. Callisto Group Title

I'm sorry but I still don't think I'm giving the answer.

14. MathLegend Group Title

Okay. :)

15. monokerous Group Title

16. Yahoo! Group Title

Or.....Do u knw Quadratic Formuld..)) it will be very easy

17. Callisto Group Title

Just want to make few points clear. 1. If I was giving answer in the first post, I'm still giving answer in the second time I did it, even with explanations. 2. I didn't intend to give answers, as always. 3. I understand that I should have explained using words, but without using a word doesn't mean that I give answer. At least, I leave some steps for the asker to do it. 4. If you have noticed since I've started typing in this post. After I left the first comment, I actually kept typing again as I found it is better to leave some words to the asker that I'm doing factorization, as you've seen above. I apologize that I didn't explain what I had done in the first post, but I still insist that I'm not giving answers.

18. Yahoo! Group Title

|dw:1346139489935:dw|

19. pratu043 Group Title

$x = \frac{ -b \pm \sqrt{b ^{2} - 4ac} }{ 2a }$

20. pratu043 Group Title

Where a is coefficient of x^2 b is coefficient of x and c is the constant.

21. monokerous Group Title

I would've just given the quadratic equation and left it at that but I think your reply was just fine. I thought it was good of you to add the explanation afterwards.

22. lgbasallote Group Title

i think what mathlegend was saying is not about the "annotations" but the "lack of interaction"