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Ipatiy [6.2K]
2 years ago
6

The lengths of two sides of a triangle are shown below:

Mathematics
1 answer:
oksano4ka [1.4K]2 years ago
6 0

<u>Part A</u>

<u />3x^2 -2x-1+9x+2x^2 -3=\boxed{5x^2 + 7x-4}

<u>Part B</u>

<u />(5x^3 +4x^2 - x-3)-(5x^2 + 7x-4)=\boxed{5x^3 - x^2 - 8x+1}

<u>Part C</u>

No, because although they provide examples for specific polynomials being closed under addition and subtraction, there is a loss of generality.

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