Question

Use the x-intercept method to find all real solutions of the equation. x^3-11x^2+31x-21=0

Answer 1

Answer:

c. $x=1,3,\:or\:7$

Step-by-step explanation:

The given equation is

$x^3-11x^2+31x-21=0$

To find all real solutions using the x-intercept method, we to graph the corresponding function using a graphing tool.

The corresponding function is;

$f(x)=x^3-11x^2+31x-21$

From the graph the x-intercepts are

(1,0),(3,0) and (7,0).

Therefore the real solutions are

$x=1,3,\:or\:7$

Answer 2

Answer:

C. is the answer

Step-by-step explanation: