Question

2×=15-x2 ? ME AJUDE OBG

Answer 1

$2x=15-x^2\\ 2x+x^2-15=0\\ x^2+2x-15\\ \\ \Delta = 2^2-4*1*(-15) = 64\\\\ x_1 = \frac{-2+ \sqrt{64}}{2*1} = \frac{6}{2}=3\\\\ x_2= \frac{-2- \sqrt{64}}{2*1} = \frac{-10}{2}=-5$