Question

Which shows the correct substitution of the values a,b,and c from the equation 0=4x^2+2x-1 into the quadratic formula below

Answer 1

the answer is b on ed

Explanation:

Answer 2

Given quadratic equation :
`0 = 4x^2+2x- 1`

Let us apply standard quadratic form
`0=ax^2+bx+c`

We know, quadratic formula

`x = (-b+-√(b^2-4ac))/(2a)`

a = 4

b = 2

c= -1

Now we plug in all the values in quadratic formula

`x = (-b+-√(b^2-4ac))/(2a) \\ x = (-2+-√(2^2-4(4)(-1)))/(2(4))\\ x = (-2+-√(18))/(8)`.

The above one is the substitution of values of a,b,c in quadratic formula.