Mathematician

Just type: "3 * 10^8"

Mistype...

When adding fractions with the same denominator, just add the numerators together: 7 + 2 = 9, so 7/11 + 2/11 = 9/11.

When typing, use this notation for power "^2"

So we have:

(2x + 1)(3x^2 - 2x - 5)

Let's use the box method of multiplication for explanation:

       3x^2    -2x      -5    

2x | 6x^3 | -4x^2 | -10x

1   | 3x^2 | -2x     | -5

Since we've multiplied all of the terms using a box, now we can add them all together:

6x^3 + 3x^2 - 4x^2 -2x - 10x - 5

After combining like terms, we have: 6x^3 - x^2 -12x -5

I am not quite sure what you mean by "clear y."

I do note that 2x/3x = 2/3 (I think) because the x's cancel each other out.

So then we have: f(x)= 2/3-1

Which come out to: f(x)= -1/3.

Why isn't what -7?

What are you asking?

This is a simple problem. Just lines up your digits and add them.

45000

+   23

-------

45023

I don't know. The best person to explain that would be be Melody, but they're not on here right now. If you come back later, Melody will have given a definite answer.

Besides, 3.14 is precise enough for most rational calculations.

You can also edit your previous post by clicking that pencil in the bottom right corner of the post you want to edit. I would suggest you link your previous post completely.

By the way, what math concepts do you know (what grade math are you in)?

Mahum, did you know there's a insert/edit link button in the top right corner of the toolbar for easier linking?