Question

the perimeter of triangle is 9m square -2n+8 and its two sides are 4m square+3n and 7m square+5n- 12 find the third side of the triangle​

Answer 1

Step-by-step explanation:

perimeter =9m²-2n+8

sides=4m²+3n

=7m²+5n-12

third side =perimeter -sum of two sides

=9m²-2n+8-(4m²+3n+7m²-2n-12)

=9m²-2n+8-(11m²+n-12)

=9m²-2n+8-11m²-n+12

=-2m²-3n+20