This is not a homework question. It is a question that I can't figure out

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SUMMARY

The discussion centers on the mathematical principles surrounding the equation x² = y², emphasizing that it does not imply x = y, as demonstrated by the example x = -y. Participants analyze the equation (4 - 9/2)² = (5 - 9/2)², clarifying that simplifications must retain the squares to avoid erroneous conclusions. The conversation highlights the importance of understanding the implications of squaring numbers in algebraic expressions.

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Remember that

x^2=y^2

doesn't mean that x=y. (indeed, we can have x=-y as well).

Here

(4-9/2)^2=(5-9/2)^2

doesn't mean that we can leave off the squares.
 
To simplify (-1/2)2 = (1/2)2
 

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