Question

x ao quadrado menos 4x + 1 = 0 ​

Answer 1

x²-4x+1=0

a: 1

b: -4

c: 1

∆=b²-4ac

∆=(-4)²-4(1)(1)

∆=16-4

∆=12

x= -b±√∆/2a

x'= -(-4)+√12/2(1)

x'= 4+2√3/2

x'= 2+√3

x"= -(-4)-√12/2(1)

x"= 4-2√3/2

x"= 2-√3

s={ 2+√3, 2-√3 }