Question

Решите уравнение
x^2 + 2x -15=0

Answer 1

${x}^{2} + 2x - 15 = 0 \ d = 4 + 60 = 64 \ x1 = frac{ - 2 - 8}{2} = - 5 \ x2 = frac{ - 2 + 8}{2} = 3$