Question

contas de 2 grau : 4+x(x-4)=x

Answer 1

4+x²-4x=x
4+x²-5x=0
Δ = b²-4ac
(-5)²-4×1×4
Δ=25-16
Δ=9
Bhaskara:
(-b+-√Δ)/2a
5+-√9/2*1
5+-3/2
x' = 5+3/2 =4
x''= 5-3/2= 1
\o