1. (3x-1)*(8x-2)=0
3x*8x+3x*(-2)-1*8x-1*(-2)=0
24x²-6x-8x+2=0
24x²-14x+2=0
∆=b²-4ac
∆=(-14)²-4*24*2
∆=196-192
∆=4
x1= (-b-√∆)/2*a
x1= (-(-14)-√4)/2*24
x1=(14-2)/48
x1=12/48
x1=0,25
x2=(-b+√∆)/2*a
x2=(-(-14)+√2)/2*24
x2=(14+2)/48
x2=16/48
x2=1/3
2. x²-50=-1
x²=-1+50
x²=49
x=√49
x=7
