Question

Rhett is solving the quadratic equation 0= x2 – 2x – 3 using the quadratic formula. Which shows the correct substitution of the values a, b, and c into the quadratic formula? Quadratic formula time remaining 51:36

Answer 1

a = 1
b = -2
c = -3

And when you plug in and solve you'll get correct answers of x = 3 and x = -1

Answer 2

The values of x = -1 and 3

Explanation:

The general form of the equation is given by : ax² + bx + c = 0

And the given equation of the form is given to be : x² - 2x - 3 = 0

Now, comparing both the equations, we get :

a = 1 , b = -2 , c = -3

Now, The quadratic formula is given by :

`x = (-b\pm √(b^2-4ac))/(2a)\\\\\implies x =(2\pm√(4+12))/(2)\\\\\implies x = (2\pm 4)/(2)\\\\\im ies x = (2-4)/(2)\:\:and\:\:x=(2+4)/(2)\\\\\implies x = -1\:\:and\:\:x=3`

Therefore, The values of x = -1 and 3