- #1
utkarshakash
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Homework Statement
The sides of a triangle are [itex]x^2+3x+3, 2x+3,x^2+2x[/itex]. Prove that the greatest angle of the triangle is 120°.
Homework Equations
The Attempt at a Solution
The greatest angle is the one opposite to the greatest side. But how to decide which one is greatest side? Also the sides are variable.