(1/3a)^2+(a-1/3a)^2=?
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(1/3a)^2+(a-1/3a)^2=?(1/3a)^2+(a-1/3a)^2=?(1/3a)^2+(a-1/3a)^2=?(1/3a)^2+(a-1/3a)^2=1/9a^2+a^2-2/3+1/
(1/3a)^2+(a-1/3a)^2=?
(1/3a)^2+(a-1/3a)^2=?
(1/3a)^2+(a-1/3a)^2=?
(1/3a)^2+(a-1/3a)^2
=1/9a^2+a^2-2/3+1/9a^2
=a^2+2/9a^2-2/3
(1/3a)^2+(a-1/3a)^2
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