Question

Equações do 2° grau x>2-7x+12=0

Answer 1

∆=b²-4ac
∆=(-7)²-4.1.12
∆=49-48
∆=1
x=-b+-√∆/2a
x=7+-√1/2.1
x=7+-1/2
x|=7+1/2=8/2=4
x||=7-1/2=6/2=3

Answer 2

b²-4ac
7²-4*(1*12)
49-48
delta =1

x= -b+-raiz de delta/2a
x1=7+1sobre2 = 4

x2= 7-1 sobre= 3