anonymous
  • anonymous
Essay question: show all work. Find the difference: (-5x^2+2x-5)-(7x^2-2x-3)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • 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
anonymous
  • anonymous
ok so what about the first half
anonymous
  • anonymous
of the equation?

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anonymous
  • anonymous
yes does it stay the same
anonymous
  • anonymous
yes. the negative sign only affects the second half of the equation.
anonymous
  • anonymous
oh ok
anonymous
  • anonymous
so it thats the whole problem or is more needed to be done
anonymous
  • 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.
anonymous
  • anonymous
ok so if it is addition you leave it as it is
anonymous
  • 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.
anonymous
  • anonymous
oh ok
anonymous
  • anonymous
make more sense?
anonymous
  • anonymous
yes thanks
anonymous
  • anonymous
Now i have a question about another problem
anonymous
  • anonymous
ok shoot

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