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Which of the following are quadratic equ...

Which of the following are quadratic equations?
`(x+2)^(2)=2x^(2)`

Text Solution

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`(x+2)^(2)=2x^(2)" ":.x^(2)+4x+4=2x^(2)`
`:.x^(2)-4x-4=0`
`(x+2)^(2)=2x^(2)` is a quadratic eqaution. The highest of variable x is 2.
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