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parry1
here is solution all the 2 are cancelled. please ask about any doubt or something
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caylus
Hello,

[tex]\boxed{(x-a)^2+(x-b)^2+(x-c)^2+x^2}\ \\ =(x^2-2ax+a^2)+(x^2-2bx+b^2)+(x^2-2cx+c^2)+\ x^2\\ =3x^2-2x(a+b+c)+x^2+a^2+b^2+c^2\\ =3x^2-4x^2+x^2+a^2+b^2+c^2\\ =\boxed{a^2+b^2+c^2} [/tex]

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