Short Answer

Identifying Bases in Difference of Squares

A structural engineer is simplifying a formula used to calculate plate stress: 4x212xy+9y225{}4x^2 - 12xy + 9y^2 - 25. After grouping the first three terms, the formula is written as (2x3y)225(2x - 3y)^2 - 25. To apply the difference of squares identity, the engineer must identify the 'bases' of the two squares. State the algebraic expression being squared in the first term and the numerical value being squared in the second term.

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Updated 2026-05-25

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