Question

Решите уравнение x^2-19x-30=0

Answer 1

x² - 19x - 30 = 0

D = (- 19)² - 4 * (- 30) = 361 + 120 = 481

$x_{1}=\frac{19+\sqrt{481} }{2}\\\\x_{2}=\frac{19-\sqrt{481} }{2}$

Answer 2

x²-19x-30=0

x=-(-19)±√(-19)²-4*1*(-3/2*1

x=19±√361+120/2

x=19±√481/2

x=19+√481/2

x=19-√481/2

x1=19-√481/2
x2=19+√481/2