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What does the graph of f(x)=(3x-5)(x+9) cross the x axis
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What does the graph of f(x)=(3x-5)(x+9) cross the x axis

User Andrei Drynov
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1 Answer

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Hello.

Firstly, we need to simplify the function:


image

The graph crosses the 'x' axis when y = 0. Ergo:


image

Therefore, the graph crosses the x axis when x = -9 and 5/3.

Hope I helped.
User Anton Shurashov
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