Question

help me solve this problem, please.

Answer 1

Answer:

hope it helps you....3rd side equals y

Answer 2

Answer:

6x^2-14x+9

Step-by-step explanation:

let the length of third side is Y

therefore

perimeter Y+ (5x+3) +(4x-5)=6x^2-5x+7

Y=6x^2-5x+7-(9x-2)

Y=6x^2-14x+9