- #1

IB

- 45

- 0

PS: One more thing. How to write mathematics with latex?

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter IB
- Start date

- #1

IB

- 45

- 0

PS: One more thing. How to write mathematics with latex?

- #2

Learning Curve

- 116

- 0

What is sqrt (a^2 - a [delta] d) equal to? or are you asking to simplify it?

- #3

IB

- 45

- 0

Yeah. I was just wondering whether it can still be simplified.

- #4

Hurkyl

Staff Emeritus

Science Advisor

Gold Member

- 14,967

- 19

But as for algebraic manipulation, what you did is wrong. roots and exponents (usually) distribute over multiplication (and division),

- #5

IB

- 45

- 0

Hurkyl said:But as for algebraic manipulation, what you did is wrong. roots and exponents (usually) distribute over multiplication (and division),notaddition (and subtraction).

Could you give an example to demonstrate that? And how can I correct my wrong algebraic manipulation? Thanks.

- #6

rocketboy

- 243

- 1

Here is the thread on how to use the LaTeX thingy:

https://www.physicsforums.com/showthread.php?t=8997

Have fun!

-Jon

- #7

VietDao29

Homework Helper

- 1,426

- 3

So:

[tex]\sqrt{a ^ 2 - a \Delta d} = \sqrt{5 ^ 2 - 5 \times \frac{9}{5}} = \sqrt{25 - 9} = \sqrt{16} = 4[/tex]

And:

[tex]a - \sqrt{a \Delta d} = 5 - \sqrt{5 \times \frac{9}{5}} = 5 - \sqrt{9} = 5 - 3 = 2[/tex]

And 4 is not 2.

Viet Dao,

- #8

IB

- 45

- 0

Thanks, VietDao29.

Share:

- Replies
- 30

- Views
- 658

- Replies
- 49

- Views
- 855

- Replies
- 15

- Views
- 1K

- Replies
- 13

- Views
- 388

- Replies
- 1

- Views
- 228

- Replies
- 11

- Views
- 478

- Replies
- 6

- Views
- 419

- Replies
- 15

- Views
- 409

- Last Post

- Replies
- 6

- Views
- 21

- Replies
- 44

- Views
- 781