Question

Using the quadratic formula, what's the value of b in this equation?
3k2 = 4k + 7

Answer 1

For this case we have a quadratic equation of the form:

`ax ^ 2 + bx + c = 0`

Rewriting the equation we have:

`3k ^ 2-4k-7 = 0`

So we have to:

`a = 3\\b = -4\\c = -7`

The solutions will come from:

`k = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2 (a)}`

Thus, the value of "b" is -4

Answer:

`b = -4`