Question

The question is in the attached image, please help!!! :(

Answer 1

2a² + 17a - 11b

Explanation:

the perimeter (P) is the sum of the 3 sides

P = - 5a² - 8b + 12a + 6b + 7a² + 5a - 3b ← collect like terms

= (- 5a² + 7a²) + (12a + 5a) + (- 8b - 3b)

= 2a² + 17a + (- 11b)

= 2a² + 17a - 11b