Решите уравнении х²+4х=5

Question

Решите уравнении
х²+4х=5

Answer 1

X² + 4x = 5
x² + 4x - 5 = 0
D = b² - 4ac = 16 - 4×(-5) = 36 = 6²
x1 = ( - 4 +6) / 2 = 1
x2 = ( - 4 - 6)/ 2 = - 5