Question

x elevado 2 -4x+3=0

Answer 1

a=1 b=-4 c=3
Δ= (-4)²-4.1.3
Δ=16-12⇒ Δ= 4

x= -(-4)+√4/  2.1
x1=3  e x2=0

Answer 2

Δ=$=(-4)^{2} -4.1.3=16-12=4;$ $x= \frac{4+/- \sqrt{4} }{2.1} = \frac{4+/-2}{2} ; x^{'} = \frac{4+2}{2} =3; x^{"} = \frac{4-2}{2} =1$