Question

X в квадрате - x - x = 2 - 1,5

Answer 1

${x}^{2} - x - x = 2 - 1.5 \\ {x}^{2} - 2x = 0.5 \\ {x}^{2} - 2x - 0.5 = 0 \\ d = {( - 2)}^{2} - 4 \times 1 \times ( - 0.5) = 4 + 2 = 6 \\ x1 = \frac{2 + \sqrt{6} }{2} \\ x2 = \frac{2 - \sqrt{6} }{2}$