K/2 + 9 = 30
Subtract 9 from each side
k/2 = 21
Multiply each side by 2 to isolate k
k = 42
Answer:
b.![x=1,3,\:or\:5](https://tex.z-dn.net/?f=x%3D1%2C3%2C%5C%3Aor%5C%3A5)
Step-by-step explanation:
The given equation is;
![x^3-9x^2+23x-15=0](https://tex.z-dn.net/?f=x%5E3-9x%5E2%2B23x-15%3D0)
To solve by the x-intercept method we need to graph the corresponding function using a graphing tool.
The corresponding function is
![f(x)=x^3-9x^2+23x-15](https://tex.z-dn.net/?f=f%28x%29%3Dx%5E3-9x%5E2%2B23x-15)
The solution to
is where the graph touches the x-axis.
We can see from the graph that; the x-intercepts are;
(1,0),(3,0) and (5,0).
Therefore the real solutions are:
![x=1,3,\:or\:5](https://tex.z-dn.net/?f=x%3D1%2C3%2C%5C%3Aor%5C%3A5)
Answer:
Step-by-step explanation: