Question

Let f(x) = 4x + 3 and g(x) = -2x + 5. Find (fg)(5).

Answer 1

8 x square + 14X + 15
where x equal to 5

given that 285

Answer 2

The value of f(g(x)) (5) is -17.

Given:-

f(x) = 4x + 3

g(x) = -2x + 5

To Find:-

The value of f(g(x)) (5).

Solution:-

We can simply calculate the value of f(g(x)) (5) by using these simple steps.

As

f(x) = 4x + 3

g(x) = -2x + 5

In first step, we will put the value of g(x) in f(x).

So,

f(x) = 4(-2x+5) + 3

f(x) = -8x + 20 + 3

f(x) = -8x +23

f(x) = 23 - 8x

Now, In second step. put x = 5 in the solve value of f(x).

So, we will get

f(5) = 23 - 8×5

f(5) = 23-40

f(5) = -17

Hence, The value of f(g(x)) (5) is -17.

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