madisoncrooke madisoncrooke

29-10-2018
Mathematics

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Express f(x) in the form a(x-h)^2+k for f(x)=x^2-8x+21

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Аноним Аноним

29-10-2018

x^2-8x+21

=x^2-2(4)(x) +16+5
=(x-4)^2+5

here a=1
h=4
k=5

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