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?

Answer 1

option A

Explanation:

Answer 2

The correct option is 1.

Explanation:

If a quadratic equation is defined as

`ax^2+bx+c=0`

then the quadratic formula is

`x=(-b\pm √(b^2-4ac))/(2a)`

The given equation is

`0=x^2-2x-3`

Here, a=1, b=-2 and c=-3.

Substitute these values in the above formula.

`x=(-(-2)\pm √((-2)^2-4(1)(-3)))/(2(1))`

`x=(2\pm √((-2)^2-4(1)(-3)))/(2(1))`

Therefore, the correct option is 1.