the perimeter of a triangle is 5x²+3x-1 and two of it's sides are 2x-5+7x² and 3x²+4-2x³+x find the third side of triangle
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Answer:
2x³ - 5x²
Steps:
(7x² + 2x - 5 )+(- 2x³ + 3x² + x + 4)
= -2x³ + 10x² + 3x - 1
5x² + 3x - 1 -(-2x³ + 10x² + 3x - 1)
= 2x³ - 5x²
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