Geor6b1rowrasking Geor6b1rowrasking

23-10-2016
Mathematics

Answered

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

Verified Answer :

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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