5. The sides of a triangle are represented by the expressions

2x2 + 4, 5x2 - 6x, and 8x + 3. What is the perimeter of the triangle?

P = 7x^2 + 2x + 7

Step-by-step explanation:

The perimeter is the sum of the lengths of the three sides of the triangle:

P = 2x^2 + 4 + 5x^2 - 6x + 8x + 3.

Group and combine like terms:

P = 2x^2 + 5x^2 + 4 + 3 - 6x + 8x, or:

P = 7x^2 + 2x + 7