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25-10-2016
Mathematics

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

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25-10-2016

factor
f(x)=(3x-5)(3x-4)
set to zero

3x-5=0
3x=5
x=5/3

3x-4=0
3x=4
x=4/3

x=4/3 and 5/3
zeroes are at (4/3,0) and (5/3,0)

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