Question

Por favor me ajudem.

Answer 1

a) 3x2-7x+2=0
∆=49-24=25
x=7+-5/6=
x1=12/6=2
x2=2/6=1/3

b)x2-6x+9=0
∆=36-36=0
x=6+-0/2=
x1=x2=6/2=3

C)x2-5x+6=0
∆=25-24=1
x=5+-1/2=
x1=6/2=3
x2=2

d)x2-8x+12=0
∆=64-48=16
x=8+-5/2=
x1=13/2
x2=3/2