Question

If f (x) = 2(x)2 +5/(x+2)

Answer 1

Answer:

f(2)=18

Step-by-step explanation:

This question asks us to find f(2). Basically, it asks us to find f(x) when x is equal to 2.

$f(x)=2(x)^2+5\sqrt{x+2}$

Therefore, we can substitute 2 in for every x in the equation above.

$f(2)=2(2)^2+5\sqrt{2+2}$

Solve the exponent first.

2^2=2*2=4

$f(2)=2(4)+5\sqrt{2+2}$

Next, multiply 2 and 4.

$f(2)=8+5\sqrt{2+2}$

Next, solve underneath the radical. Add 2 and 2.

$f(2)=8+5\sqrt{4}$

Next, solve the square root. The square root of 4 is 2.

$f(2)=8+5(2)$

Multiply 5 and 2.

$f(2)=8+10$

Finally, add 8 and 10.

$f(2)=18$

Answer 2

Answer:

18

Step-by-step explanation:

f (x) = 2*x² + 5*√(x+2)

substitute x = 2 in 2*x² + 5*√(x+2)

2*2² + 5*√(2+2)

2*4 + 5*√(4)

8 + 5* 2

8 + 10

18