Question

Yordam bervorila algebradan 3,4,5 misollar

Answer 1

Ответ:

№3

y = -4x² + 3x - 1

1) -4x² + 3x - 1 = -2

-4x² + 3x - 1 + 2 = 0

-4x² + 3x + 1 = 0

D = b² - 4ac

D = 3² - 4 • (-4) • 1 = 9 + 16 = 25

$x1 = \frac{ - b + \sqrt{d} }{2} = \frac{ - 3 + \sqrt{25} }{2} = \frac{ 2}{2} = 1$

$x2 = \frac{ - b - \sqrt{d} }{2} = \frac{ - 3 - \sqrt{25} }{2} = \frac{ - 8}{2} = - 4$