Question

Qual as Raízes da Equação X^2-5 x +6=0?


S={3;2}


S={45;7}


S={8;9}


S={1;5}


S{6;7}

Answer 1

x² -5x +6=0

∆= b²-4ac=5²-4.1.6=25-24=1 => √∆=1

x= -b±√∆/2a

x= 5±1/2.1

x' =5+1/2= 6/2 = 3

x"=5-1/2= 4/2 = 2

===> S={3;2}