a) 3x^2-3x+4x-4=0=>3x^2+x-4=0
Delta=b^2-4ac=>Delta=1-4×3×(-4)=>Delta=1+48=>Delta=49
X1=(-b+ rad.din delta)/2a=>X1=(-1+7)/6=>x1=6/6=>x1=1
x2=(-b-rad.din delta)/2a=>x2=(-1-7)/6=>x2=-6/6=>x2=-1
b)x^2-4=3x=>x^2-3x-4=0=>delta=9-4×1×(-4)=>delta=9+16=25
X1=(3+5)/2=>x1=8/2=>x1=4
X2=(3-5)/2=>x2=-2/2=>x2=-1
