Question

Solve for f(7)
f(x) = 2x² + 7x + 1​

Answer 1

Answer: f(7) = 148

Explanation:

In order to find f(7), substitute 7 for x:

`\bullet\quad\sf{f(x)=2x^2+7x+1}`

`\bullet\quad\sf{f(7)=2(7)^2+7(7)+1}`

`\bullet\quad\sf{f(7)=2*49+49+1}`

`\bullet\quad\sf{f(7)=98+50}`

`\bullet\quad\sf{f(7)=148}`

Answer 2

• f(7) = 148

In-depth explanation:

Hi! The question is asking us to solve for f(7).

Plug in 7 for x:

`\sf{f(x)=2x^2+7x+1}`

Note: Be sure to plug in 7 everywhere x occurs.

`\sf{f(7)=2(7)^2+7(7)+1}`

`\sf{f(7)=2*49+49+1}`

Remember PEMDAS.

`\sf{f(7)=98+49+1}`

`\sf{f(7)=148}`

Therefore, when x = 7, f(x) = 2x² + 7x + 1 equals 148.