Solution of the quadratic equation

MATHEMATICS · Single correct · AoPS · Mathematics · Special Functions · Special Functions

Problem

Solution of the quadratic equation (3∣x∣−3)2=∣x∣+7(3|x|-3)^2=|x|+7, which belongs to the domain of the function y=(x−4)xy=\sqrt{(x-4)x} is: (a) ±19, ±2\pm\frac{1}{9},\ \pm2 (b) 19, 8\frac{1}{9},\ 8 (c) −2, −19-2,\ -\frac{1}{9} (d) −19, 8-\frac{1}{9},\ 8

Related theory

Browse the problem library