Simplify : ( x - y - z )2 + ( x + y + z )2
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Answer:
4x
Step-by-step explanation:
(x-y-z)2=>2x-2y-2z
(x+y+z)2=>2x+2y+2z
==>2x-2y-2z+2x+2y+2z
==>2y and 2z get cancelled because of opposite signs
Therefore 2x+2x = 4x
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