Question

Is this simplified correctly?

(3x^2 + 8) - (2x^2 + 1)
3x^2 + 8 - 2x^2 - 1
3x^2 - 2x^2 + 8 - 1
x^2 + 7

Answer 1

yes

Answer 2

Thanks!

Answer 3

anything else ?

Answer 4

Yes, I have some more to check. Just a moment, let me type them in...

Answer 5

oay

Answer 6

(5x^2 + 3x - 4) - (x^2 - 6x)
5x^2 + 3x - 4 - x^2 + 6x
5x^2 - x^2 + 3x + 6x - 4
4x^2 + 9x - 4

Answer 7

thats right too

Answer 8

How about this one?

(10x^2 - 5) - (12x^2 + 4x - 3)
10x^2 - 5 - 12x^2 - 4x + 3
10x^2 - 12x^2 - 5 + 3 - 4x
-2x^2 - 8 - 4x

Answer 9

that one isnt correct
it will be
-2x^2 -4x -2

Answer 10

Where did I go wrong? Can you explain?

Answer 11

look it will be like this
10x^2 - 5 -12x^2 -4x +3
-2x^2 -4x -2

Answer 12

I still don't understand.

Answer 13

can you look at the problem you post
is it like the one you have or you have wrote it incorrectly ?

Answer 14

It's the same. But I don't understand how you got -2 at the end.

Answer 15

because -5 + 3 = -2

Answer 16

Oh, I see. I was thinking minus 5, but it's really negative 5. Now I understand.

Answer 17

Thanks!

Answer 18

yw
anything else ?

Answer 19

I have 7 more. Let me type them in...

Answer 20

Oh, one more question about the last one. Does it make any difference if I write the answer as -2x^2 - 2 - 4x instead of -2x^2 - 4x - 2 ?

Answer 21

@Hamoody1996 ?

Answer 22

absolutely not
but according to the formula ax^ + bx + c
it is more popular to be -2x^2 - 4x - 2