deontarr2139 deontarr2139

24-09-2017
Mathematics

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What are the zeroes of f(x) = x2 − 9x + 20?

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magistercollege magistercollege

24-09-2017

First, factor the polynomial. Then, set each binary answer to zero and solve. Those are the values of x where the graph either crosses or touches the graph.
x²-9x+20
(x-5)(x-4)

x-5=0 | x=5
x-4=0 | x=4

The zeros are 4 and 5

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