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
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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
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