Question

which shows the correct substitution of the values a, b, and c from the equation 0 = 4x2 2x – 1 into the quadratic formula below? quadratic formula: x = -b±√b^2-4ac/2a

Answer 1

Explanation:

Its Option A for those who didn’t get the explanation.

Answer 2

`0 = 4x^2+2x- 1`

Quadratic formula is

`x = (-b+-√(b^2-4ac))/(2a)`

'a' is the coefficient of x^2 = 4

'b' is the coefficient of x = 2

'c' is the constant = -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.