Question

Решите уравнение 2x^2+4x-6/x^2-9=1

Answer 1

(2x² + 4x - 6) / (x² - 9)= 1
2x² + 4x - 6 = x² - 9
2x² - x² + 4x - 6 + 9 = 0
x² + 4x + 3 = 0
D = b² - 4ac = 16 - 4 × 3 = 4 = 2²
x1 = ( - 4 + 2) / 2 = - 1
x2 = ( - 4 - 2) / 2 = - 3