Question 403424
Divide both sides by 2 to get {{{x^2 + 7x - 60 = 0}}}. Luckily, this factors to {{{(x - 5)(x + 12) = 0}}} --> x = 5 or x = -12. We take the positive solution x = 5, and get a right triangle with lengths 5, 12, 13.