HelloKitty17
  • HelloKitty17
FAN AND MEDAL!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Mathematics
  • Stacey Warren - Expert brainly.com
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
HelloKitty17
  • HelloKitty17
The lengths of two sides of a triangle are shown below: Side 1: 5x2 + 2x - 3 Side 2: 8x - 3x2 + 2 The perimeter of the triangle is 2x3 - 5x2 + 4x - 8. Part A: What is the total length of the two sides, 1 and 2, of the triangle? (4 points) Part B: What is the length of the third side of the triangle? (4 points) Part C: Do the answers for Part A and Part B show that the polynomials are closed under addition and subtraction? Justify your answer. (2 points)
welshfella
  • welshfella
Part A: 5x2 + 2x - 3 + 8x - 3x2 + 2 add like terms
welshfella
  • welshfella
for example 5x^2 and -3x^2 are like terms adding them gives 2x^2 now do the same with the 2 terms in x and the 2 numbers

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OregonDuck
  • OregonDuck
Part A. Just add side 1 and side 2, combining similar terms and being careful of signs. Side 1: 5x2 + 2x - 3 + Side 2: 8x - 3x2 + 2 =----------------
OregonDuck
  • OregonDuck
2x3 - 5x2 + 4x -8
OregonDuck
  • OregonDuck
Part A: 2x2+10x-1 Part B: 2x3 - 7x2 -6x - 7 Part C: You could show this by adding side 1 , side 2 and the answer you got for Part B and showing that result is equal to the given Perimeter.
OregonDuck
  • OregonDuck
@Aureyliant @LegendarySadist
OregonDuck
  • OregonDuck
help with part c plz
HelloKitty17
  • HelloKitty17
@Ashleyistheboss2
welshfella
  • welshfella
the addition of the 2 polynomials gives another polynomial the subtraction also gives another polynomial this supports the assertion

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