Question

Evaluate the function f(r)= the square root of r+2 +9 at the given values of the independent variable and simplify. a. f(-2) b. f(14) c. f(x-2)

Answer 1

`\sqrt[]{r+2+9}`

Replace r by each value and simplify:

a . f(-2)

`\sqrt[]{-2+2+9}`
`\sqrt[]{9}`
`3`

b. f(14)

`\sqrt[]{14+2+9}=\sqrt[]{25}=5`

c.f(x-2)

`\sqrt[]{x-2+2+9}=\sqrt[]{x+9}`

Answers:

a. 3

b. 5

c. √(x+9)