Question

a função f(x)=x2-4x+3 tem raizes iguais a

Answer 1

∆=b² -4ac = (-4)² -4.1.3=4 => √∆=2

x' = -b+√∆/2a = 4+2/2 = 6/2= 3 ✓

x" = -b-√∆/2a = 4-2/2 =2/2 = 1 ✓