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Questions  >>  Olympiad-Math  >>  Class 9  >>  Polynomials
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The value of (x + 2y + 2z)2 + (x - 2y - 2z)2 is:


( A ) 2x2 + 8y2 + 8z2
( B ) 2x2 + 8y2 + 8z2 + 8xyz
( C ) 2x2 + 8y2 + 8z2 + 16yz
( D ) 2x2 + 8y2 + 8z2 - 8yz

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