# [RESOLVED] How to solve arithmetical problems?

• March 28th, 2014, 02:34 AM
user007
[RESOLVED] How to solve arithmetical problems?
Here is the problem I need to solve:

Attachment 32481

Here is the code I created in order to solve it:

Code:

```double numx, numz, result;             numx = Convert.ToDouble(textBox1.Text);             numz = Convert.ToDouble(textBox2.Text);             result = Math.Pow(numx, 2) + Math.Pow(numz, 2) / 1 - Math.Pow(numx, 2) - Math.Pow(numz, 2) / 2;             label1.Text = result.ToString();```
But when solving the problem manually I get different answer, so what I'm doing wrong? A help would be appreciated and thanks for your time in advance.

Kind regards,

Ron
• March 28th, 2014, 08:51 AM
Nikel
Re: How to solve arithmetical problems?
You are grouping wrong. Multiplication and division precede addition and substraction.
Code:

`result = (Math.Pow(numx, 2) + Math.Pow(numz, 2)) / (1 - (Math.Pow(numx, 2) - Math.Pow(numz, 2)) / 2);`
When having doubts with this sort of problems, reduce your expression to chunks of the ecuation.
Code:

```A = X^2 + Z^2 B = X^2 - Z^2 C = B / 2 D = 1 - C E = A / D result = E```
Hope it helps. Good luck!