Question

To solve the following equation for k using the quadratic formula, what value would you substitute for b?

3k2 = 4k + 7

Answer 1

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

ax² + bx + c = 0

Rewriting the equation we have:

3k² -4k - 7 = 0

So we have to:

a = 3

b = -4

c = -7

The solutions will come from:

k = -b±√b²-4(a)(c)/2(a)

Thus, the value of "b" is -4

Answer:

b = -4