Question

The perimeter of a triangle is 7p^2-8p+9 and two of its sides are 2p^2-p+1 and 11p^2-3p+5. Find the third side of the triangle.​

Answer 1

Answer:

7p² - 8p + 9

(2p²-p+1)+(11p²-3p+5) + x = 7p²-8p+9

13p² - 4p + 6 + x = 7p² - 8p + 9

6p² + 4p - 3 + x = 0

x = - 6p² - 4p + 3

x = -(6p²+4p -3)