Question

Solve: x2 - 20x + 36 = 0

Answer 1

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

Answer 2

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

Answer 3

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.

Answer 4

You basically just gave out the answer.

Answer 5

@MathLegend Did I? Where's the answer?

Answer 6

I said you basically did if you can read.

Answer 7

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.

Answer 8

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

Answer 9

Liek as you go from Step 1 to Step 2

Answer 10

Like*

Answer 11

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

Answer 12

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

Answer 13

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

Answer 14

Okay. :)

Answer 15

@Ghatiii, did you get your answers?

Answer 16

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

Answer 17

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.