Question

The perimeter of the given triangle is 3x² + 2 units

and its two sides are given in the figure. Find its
third side.

Answer 1

Explanation:

Perimeter is the total of all three sides added together:

2x^2 + x + 3x^2 -3 + ? = 3x^2 + 2 Simplify a bit on the L

5x^2 + x -3 + ? = 3x^2 + 2 subtract 5x^2 from both sides

x-3 + ? = - 2x^2 + 2 subtract x from both sides

-3 + ? = - 2x^2 - x + 2 finally, add 3 to both sides

? = - 2x^2 -x + 5