Question

Распишите как решить x^2-6 x+8 = 0

Answer 1

D= 6^2-4*1*8=4 X1= 6+2/2=4 X2=6-2/2=2

Answer 2

X² - 6x + 8 = 0
1) D = b² - 4ac
    D = (-6)² - 4 * 1 * 8 = 36 - 32 = 4

x = $\frac{-bб \sqrt{D} }{2a}$

x = $\frac{6б2}{2}$

x1 = 4    ;   x2 = 2

2) D = k² - ac
    D = (-3)² - 1 * 8 = 1

x = $\frac{-kб \sqrt{D} }{a}$

x = $\frac{3б1}{1}$

x1 = 4   ;   x2 = 2