Question

x
$x {2} - 4x + 3 = 0$
​

Answer 1

Ответ:

D=16-4*3=16-12=4=2^2

x1= 4-2 / 2 = 2/2 = 1

x2= 4+2 / 2 = 6/2 = 3

Answer 2

$\displaystyle x^2-4x+3=0\;\;\;\; \boxed{a=1\;\;\;\;b=-4\;\;\;\;c=3}\\\\D=(-4)^2-4*1*3=16-12=\sqrt{4}=2^2 \\\\x_1=\frac{-(-4)-\sqrt{4} }{2*1} =\frac{4-2}{2} =\frac{2}{2} =1\\\\x_2=\frac{-(-4)+\sqrt{4} }{2*1} =\frac{4+2}{2} =\frac{6}{2} =3\\\\\\x_1=1\;\;\;\;\;x_2=3$