Geor6b1rowrasking Geor6b1rowrasking

23-10-2016
Mathematics

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Which number completes the square? x^2-4x?

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Marvinbrylle Marvinbrylle

23-10-2016

x^2-4x=0 Let x=0 0^2=4(0)=0 0=0 [checks out] and x^2-4x=0 (4)^2-4(4)x=0 16-16=0 0=0 [also checks out]

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