Use a graphing calculator to approximate the real zeros. Give each zero as a decimal to the nearest tenth.
-$$f ( x ) = x ^ { 3 } + 3 x ^ { 2 } - 3 x - 9$$
A) $3,1.7 , - 1.7$
B) $3,1.6 , - 1.6$
C) $- 3,1.8 , - 1.8$
D) $- 3,1.7 , - 1.7$

Question

Quizplus · Accepted Answer

Using a graphing calculator to approximate the real zeros of the function $f(x) = x^3 + 3x^2 - 3x - 9$, we find that the zeros are close to -3, 1.7, and -1.7.

Use a Graphing Calculator to Approximate the Real Zeros f(x)=x3+3x2−3x−9f ( x ) = x ^ { 3 } + 3 x ^ { 2 } - 3 x - 9f(x)=x3+3x2−3x−9

Use a Graphing Calculator to Approximate the Real Zeros $f ( x ) = x ^ { 3 } + 3 x ^ { 2 } - 3 x - 9$