Find the largest value of $x$ such that $3x^2 + 17x + 15 = 2x^2 + 21x + 12 - 5x^2 + 17x + 34.$
rearrange terms for clarity (3x2 – 2x2 + 5x2) + (17x – 21x – 17x) + (15 – 12 – 34) = 0
combine like terms 6x2 – 21x – 31 = 0
A parabola that opens upward has no largest value.
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+1694 
