Which is a zero of the quadratic function f(x) = 4x2 + 24x + 11?

Set the function equal to zero: 4x² + 24x + 11 = 0. The quadratic formula gives x = (−24 ± √(24² − 4·4·11))/8 = (−24 ± 20)/8, so the zeros are −5.5 and −0.5. Choice B, x = −5.5, is a zero.

AI-written and checked against the verified answer.