x1,x2€f(x)
f(x)=x^2-4x+m=0
a=1
b=-4
c=m
Delta: b^2-4ac=16-4m
x1=(4-√16-4m/2a=4-4-√4m)/2a
x2=(4+√16-4m/2a=4+4-√4)/2a
x1=-√4m/2a|n^2
x1=-4m/4
x2=8-√4m/2|n^2
x2=(64-32√m+4m)/4
(-4m/4+64-32√m+4m)/4=2
(-4m+64-32√m+4m)/4=2|*4
64-32√m=8
-32√m=-56
√m=-56/-32
√m=1.75
m=1.75^2
m=3.0625
