Question

dau coroana urgent !

Answer 1

a)x*(x-1)=0

x1=0; x2=1

b)x²+2x-3=0

∆=4²-4*1*(-3)= 16+12=28

x1=-b-√∆/2a=-2-√28/2

x2=-b+√∆/2a=-2+√28/2

c)2x²-x+2=0

∆=1-4*2*2=1-16=-15<0 - nu are soluţii