SOLUTION: Find the measure of the third side of the triangle given its 2 sides and perimeter. Side1 = 2x^2+5, Side2 = x^2+3x+4, P = 4x^2+12x+10. Please help

Algebra ->  Triangles -> SOLUTION: Find the measure of the third side of the triangle given its 2 sides and perimeter. Side1 = 2x^2+5, Side2 = x^2+3x+4, P = 4x^2+12x+10. Please help      Log On


   

Question 950552: Find the measure of the third side of the triangle given its 2 sides and perimeter. Side1 = 2x^2+5, Side2 = x^2+3x+4, P = 4x^2+12x+10. Please help
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

Side1 a=+2x%5E2%2B5,
Side2 b=+x%5E2%2B3x%2B4,
P+=+4x%5E2%2B12x%2B10
find Side3 c
P+=a%2Bb%2Bc.....solve for c
c=P+-%28a%2Bb%29.......plug in given values
c=4x%5E2%2B12x%2B10+-%282x%5E2%2B5%2Bx%5E2%2B3x%2B4%29
c=4x%5E2%2B12x%2B10+-%283x%5E2%2B3x%2B9%29
c=4x%5E2%2B12x%2B10+-3x%5E2-3x-9
c=x%5E2%2B9x%2B1
so, Side3 is x%5E2%2B9x%2B1