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## anonymous 4 years ago Essay question: show all work. Find the difference: (-5x^2+2x-5)-(7x^2-2x-3)

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1. anonymous

for the second half of the question you need to distribute the negative sign. so it becomes: (-7x^2+2x+3) so the full equation now is (-5x^2+2x-5)-(-7x^2+2x-3) Then you subtract life terms. So it is: -5x^2-(-7x^2)=2x^2 then: 2x+2x=4x then: -5-(-3)=2 so it would come out to: 2x^2+4x-2

2. anonymous

ok so what about the first half

3. anonymous

of the equation?

4. anonymous

yes does it stay the same

5. anonymous

yes. the negative sign only affects the second half of the equation.

6. anonymous

oh ok

7. anonymous

so it thats the whole problem or is more needed to be done

8. anonymous

BUT you only distribute the negative sign when its a subtraction problem, not addition. and yes. the answer at the bottom is the full answer.

9. anonymous

ok so if it is addition you leave it as it is

10. anonymous

yesss. i did the equation horizontally, but it might be easier to do it vertically. look at the problem like this$-5x^2+2x-5\over7x^2-2x-3$ think of the line in the middle as the line that tells you to subtract. since all the like terms are lined up it makes it easier.

11. anonymous

oh ok

12. anonymous

make more sense?

13. anonymous

yes thanks

14. anonymous

Now i have a question about another problem

15. anonymous

ok shoot

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