Question

$x^{2} -4x-3=0$

Answer 1

x²-4x-3=0
D=16+12=28
x1=(4-2√7)/2=2-√7
x2=2+√7

Answer 2

х²-4х-3=0
D=16-4*(-3)=16+12=28
x1=(4+√28)/2=(4+2√7)/2=2+√7
x2=(4-√28)/2=(4-2√7)/2=2-√7