Question

How are the functions simplified, and how do we determine the value of f(4) and g(-5)?

Answer 1

Given the functions;

`\begin{gathered} f(x)=-5x-3 \\ \\ g(x)=2x^2-3x \end{gathered}`

Then;

`\begin{gathered} when\text{ }x=4; \\ f(4)=-5(4)-3 \\ \\ f(4)=-20-3 \\ \\ f(4)=-23 \end{gathered}`

Also;

`\begin{gathered} when\text{ }x=-5; \\ g(-5)=2(-5)^2-3(-5) \\ \\ g(-5)=2(25)+15 \\ \\ g(-5)=50+15 \\ \\ g(-5)=65 \end{gathered}`

ANSWERS:

`\begin{gathered} f(4)=-23 \\ \\ g(-5)=65 \end{gathered}`