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Question

The expanded form of an expression is x2+y2+z2+2xy+2yz+2zx. Which of the following is the expression?


A
(x+y+z)2
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B
(xyz)2
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C
(x+yz)2
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D
(x+y+z)2
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Solution

The correct option is D (x+y+z)2
(x+y+z)2=x2+y2+z2+2xy+2yz+2zx.

(x+y+z)2 is the required expression.

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