Question

Solve x2 + 4x - 5 = 0 using quadratic formula​

Answer 1

Quadratic formula is -b+_ √b^2-4ac / 2a

In that equation,

a=1

b=4

c=-5

So put these informations to quadratic formula,

-4+_ √16-4*1*-5 / 2

= -4+_ √16+20 / 2

= -4+_ √36 / 2

= -4+_6 / 2

To calculate this, the answers are

-4+6 / 2 and -4-6 / 2

2 / 2 and -10 / 2

So answers are 1 and -5

1, -5