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MAXImum [283]
2 years ago
14

Consider the functions below. f(x) = x² - 6x - 27 g(x) = x - 9

Mathematics
1 answer:
aleksklad [387]2 years ago
3 0
Correct answer: 1) (f/g)(x)

Solution: f(x)=x^2-6x-27=(x+3)(x-9)

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Answer:

See below.

Step-by-step explanation:

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(b) A solution was found by introducing the operator i which stands for the square root of -1.

So the solution is  

= 5 +/- √(15) i.

These are called complex roots.

(c) Substituting in the original equation:

x^2 - 10 + 40:

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=  25 - 15 - 50 + 40

= 0.   So this checks out.

Now substitute 5 - √(-15)i

= 25 - 10√(-15)i - 15 - 50 + 10√(-15)i  + 40

=  25 - 15 - 50 + 40

= 0.  This checks out also.

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