Use the zero or root feature of a graphing utility to approximate the zeros of $f ( x ) = 2 x ^ { 3 } + 8 x ^ { 2 } - 5 x - 7$ accurate to the nearest thousandth.
A) x = -4.692
B) x = -8.492, -0.695, 1.186
C) x = -3.575
D) x = -4.388, -0.720, 1.108
E) x = -3.910, -0.763, 1.173

Question

Quizplus · Accepted Answer

The zeros of the function can be found using a graphing utility, and the correct zeros, rounded to the nearest thousandth, are -4.388, -0.720, and 1.108.

Use the Zero or Root Feature of a Graphing Utility f(x)=2x3+8x2−5x−7f ( x ) = 2 x ^ { 3 } + 8 x ^ { 2 } - 5 x - 7f(x)=2x3+8x2−5x−7

Use the Zero or Root Feature of a Graphing Utility $f ( x ) = 2 x ^ { 3 } + 8 x ^ { 2 } - 5 x - 7$