Question

20. The perimeter of a triangle is 6p - 4p +9 and two of its sides are p²-2p+1 an
3p2-5p+3. Find the third side of the triangle.​

Answer 1

three sides of triangle=perimeter

p²-2p+1+3p²-5p+3+x=6p-4p+9

4p²-7p+4+x=2p+9

4p²+x=2p+9+7p-4

4p²+x=9p+5

x=9p+5-4p²

hope it helps..