Question

Resolva a equaçao abaixo na variavel x .
x²- 8x+16=4

Answer 1

x^2-8x+16-4
x^2-8x+12

Δ=b²-4*a*c
Δ=-8²-4*(1)*(12)
Δ=64-4*(12)
Δ=64-(48)
Δ=16

x = -b±√(Δ)/2*a
x' = (8)+√(16)/2*(1)
x' = (8)+(4)/(2)
x' = 12/2
x' = 6

x = -b±√(Δ)/2*a
x'' = (8)-√(16)/2*(1)
x'' = (8)-(4)/(2)
x'' = 4/2
x'' = 2