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Mathematics 7 Online
OpenStudy (anonymous):

Find the zeros of the function. f(x) = 9x2 - 27x + 20

OpenStudy (imstuck):

Do you know what it means to find the zeros of a function?

OpenStudy (anonymous):

no

OpenStudy (imstuck):

It means that this is the place where the graph goes through the x axis. Something like these|dw:1403240198665:dw|I know those look crazy, but wherever the graph goes through the x axis is a zero of the function. You find the zeros of a function by factoring it, setting the factors equal to zero and solving for x. Like in this example\[x ^{2}+3x+2\]you can factor that to (x + 2)(x + 1), right?

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