Question

-x+5x-4=0 equação de 2 grau

Answer 1

-x+5x-4=0 .(-1)
X-5x+4=0
Delta=(-5)2 -4.1.(-4)
Delta=25+16
Delta=41
X=-b+ou-raiz de delta/2.a
X=-(-5)+ou-raiz de 41/2.1
X=5+ou-41/2
X1=5+41/2 = 46/2 = 23
X2=5-41/2 = -36/2 = -18

Answer 2

-x + 5x - 4 = 0

- x + 5x = 4

4x = 4

x = 4/4

x = 1   Resposta.