Find the zeros of f(x) = 4x 2 + 5x - 21.
a.) {-7/4, 3}
b.) {7/4, -3}
c.) {3/4, -7}

ANSWER

The correct choice is B

EXPLANATION

The given function is

To find the zeros, we equate the function to zero.

We split the middle term to get:

Factor by group,

Factor further,

Use the zero product property,

Hence the zeros are:

B.) {7/4, -3}