We have an answer to "Let f(x)=−9x+20 and g(x)=x2+8Find f(−5)⋅g(−5)"

Reuben Brennan

Answered question

2022-03-23

Let

f (x) = - 9 x + 20

and

g (x) = x^{2} + 8

Find

f (- 5) \cdot g (- 5)

enriuadaziaa

Beginner2022-03-24Added 7 answers

Step 1
Functions are given by

f (x) = - 9 x + 20

and

g (x) = x^{2} + 8

x = - 5

, the value of function

f (x)

f (- 5) = - 9 x (- 5) + 20

\Rightarrow f (- 5) = 65

Step 2
At

x = - 5

, the value of

g (x)

g (- 5) = {(- 5)}^{2} + 8

\Rightarrow g (- 5) = 25 + 8

\Rightarrow g (- 5) = 33

Now, the value of

f (- 5) \cdot g (- 5)

can be evaluated as following:

f (- 5) \cdot g (- 5) = 66 \cdot 33

\Rightarrow f (- 5) \cdot g (- 5) = 2145

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