Question

find the value of x in the quadratic equation x²+4x-5=0 using the quadratic formula.​

Answer 1

Resposta:

Explicação passo a passo:

x²+4x-5=0

a = 1; b = 4; c = - 5

/\= b^2 - 4ac

/\= 4^2 - 4.1.(-5)

/\= 16+20

/\= 36

\/ /\= 6

X = (- b +/- \/ /\)/2a

X = (- 4 +/- 6)/2

X' = (-4-6)/2 = -10/2= - 5

X " = (-4+6)/2= 2/2 = 1