3.
The three sides of a triangle are 3x² + 2x
- 1 and 4x2 + x + 4 and 5x2 + 3x - 2. Find
the perimeter of the triangle.
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Required equired perimeter = Sum of three sides
= x2 – 3xy + 8 + 4x2 + 5xy – 3 + 6 – 3x2 + 4xy
= x2 + 4x2 – 3x2 – 3xy + 5xy + 4xy + 8 – 3 + 6
= 2x2 + 6xy + 11
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