30.54

Which shows the correct substitution of the values a, b, and c from the equation - 2 = - x + x2 - 4 into the quadratic formula?

Quadratic formula: x=

-bt/b² - 4ac

2a

x=1 + or - √ (1) - (-8) / -2

Step-by-step explanation:

-2=-x+x^2-4

-2+4 = x^2-x

2=x^2-x

x^2-x-2=0

Quadratic formula

x=-b + or - √b^2-4ac/2a

from the equation

a=1

b=-1

c=-2

Insert the variables into the quadratic formula

We have

x = - (-1) + or - √ (-1) ^2 - 4 * (1) * (-2) / -2 * (1)

x=1 + or - √ (1) - (-8) / -2

=1 + or - √1+8/2

=1 + or-√9/2

=1 + or - 3/2

=1+3/2 or 1-3/2

=4/2 or - 2/2

x=2 or - 1