Help??
Subtract the polynomials, showing all the steps
( 9x - 4) – (3x + 2) =

2. ( 3x^2 + 8) – (2X^2 + 1 ) =

Question

Help??
Subtract the polynomials, showing all the steps
( 9x - 4) – (3x + 2) =

2.	( 3x^2 + 8) – (2X^2 + 1 ) =

sleepyjess · Answer

(9x-4)-(3x+2)
the - in front of the second polynomial means you will multiply (3x+2) by -1
can you do that?

sleepyjess · Answer

@loopgirl I need you to at least try before I can move forward

anonymous · Answer

Sorry, but i don't understand.

sleepyjess · Answer

what is 3*-1?

anonymous · Answer

I don't understand where you got -1

sleepyjess · Answer

from the - in front of 3x+2

anonymous · Answer

Ok

sleepyjess · Answer

so all that - means is that you are going to change the signs in the parentheses
so - becomes + and + becomes -
3*-1 becomes -3 so what do you think +2 will be?

anonymous · Answer

-2

sleepyjess · Answer

correct so now we can remove the parentheses from the entire equation
now we have 9x-4-3x-2
now combine like terms and you have the answer

anonymous · Answer

so -6?

sleepyjess · Answer

what is 9x-3x?

anonymous · Answer

6x

sleepyjess · Answer

correct and -4-2 is -6 which you already got so your answer will be 6x-6

anonymous · Answer

Ok, I understand now. thank you

sleepyjess · Answer

try the next one on your own and let me know what you come up with

anonymous · Answer

Ok

anonymous · Answer

I got 17 - 5 but it doesn't seem right.

sleepyjess · Answer

what did you get after multiplying $(2x^2+1)*-1$?

anonymous · Answer

I got -5

sleepyjess · Answer

what is $2x^2*-1$?

anonymous · Answer

4

sleepyjess · Answer

how are you getting 4? there is no value for x

anonymous · Answer

Exponent 2 * -1 = -2
 -2 * -2 = 4

sleepyjess · Answer

no all you need to do is change the sign to begin with it is positive so now it will be negative

anonymous · Answer

what would the equation look like? because i would think that it would look like -2x^2 but i still don't think that is right.

sleepyjess · Answer

yes that is correct for the first part

sleepyjess · Answer

now what is 1*-1?

anonymous · Answer

-1

sleepyjess · Answer

correct so now your full equation is $3x^2+8-2x^2-1$ now $3x^2-2x^2=~\sf and~8-1$

anonymous · Answer

would combine like terms?

sleepyjess · Answer

yes

anonymous · Answer

so is this what it would look like? 1x^2 -7

sleepyjess · Answer

it would be x^2 but your last term is wrong
should be 8-1

anonymous · Answer

OK thank you

sleepyjess · Answer

so your final answer will be $x^2+7$

anonymous · Answer

Ok