Question

Найдіте через дискриминант
x^2+4x-5=0

Answer 1

D = b^2 - 4ac.
b = 4, a = 1, c = -5.
D = 16 +20 = 36, √D =6.
$x = \frac{ - 4 - 6}{2} = \frac{ - 10}{2} = - 5$
$x = \frac{ - 4 + 6}{2} = \frac{2}{2} = 1$
Ответ: -5, 1

Answer 2

D=4^2-4×1×(-5)=36
x1=-4+6/2=1
x2=-4-6/2=-5