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2 years ago

How do you solve x2 – 4 = 5 by graphing the related function

Mathematics

1 answer:

vova2212 [387]2 years ago

5 0

Answer:

see attached

Step-by-step explanation:

The related function we like to graph is the one that has the solutions as its zeros.

Subtract 5 from both sides.

x² -9 = 0

This is now in the form ...

f(x) = 0

The related function is then ...

f(x) = x² -9

and its zeros are the solutions to the original equation. The zeros (x-intercepts) of f(x) are x = -3 and x = 3.

<em>Additional comment</em>

The second attachment shows a graph of the given equation. Essentially, its graph is two points on the number line: x = -3 and x = 3.

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Step-by-step explanation:

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