Question

The functions f and g are defined as follows. F(x)=-5x-3,g(x)=2x^(2)-3x Find f(3) and g(-5)

Answer 1

F(3)= -18

G(-5)= 65

Explanation:

F(3)= - 5(3)-3

F(3)= -18

G(-5)= 2(-5)^(2)-3(-5)

G(-5)= 65

Answer 2

Given to us that:–

• 
  `\mathbf{f(x) = -5x - 3}`
• 
  `\mathbf{g(x)=2x^2-3x}`

To find:–

• 
  `\mathbf{f(3) \: \: \& \: g(-5)}`

By substituting the value into the function:

➱
`\mathbf{f(3)=5(3)-3}`

➱
`\mathbf{f(3)=15-3}`

➱
`\mathbf{f(3)=12}`

Henceforth, f(3) = 12 .

Now, Find g(-5) :

➱
`\mathbf{g(-5)=2(-5)^2-3(-5)}`

➱
`\mathbf{g(-5)=2*25+15}`

➱
`\mathbf{g(-5)=50+15}`

➱
`\mathbf{g(-5)=65}`

Henceforth, g(-5) = 65 .