Question

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

Answer 1

2 p^{2}+3p+5 is the answer 

Answer 2

Perimeter of the triangle =
${6p}^{2} + 4p + 9$

1st side =
${p}^{2} - 2p + 1$
2nd side =
${3p}^{2} - 5p + 3$
Third side = Perimeter - (1st side + 2nd side)
$( {6p}^{2} - 4p + 9) - ({4p}^{2} - 7p + 4)$
${2p}^{2} + 3p + 5$