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Subtracting polynomials

Subtracting polynomials-example-1

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Answer:

The third side of the triangle is 10x + 3

Explanation:

x + 1 + 2x + 4 = 3x + 5

( 13x + 8 ) - ( 3x + 5 ) = 13x + 8 - 3x - 5

= 10x + 3

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