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Using abbreviated multiplication formulas to transform expressions

Shortcut multiplication formulas help you expand parentheses, factor expressions, and simplify calculations quickly. The key skill is recognizing which formula fits a given expression.
First recognize the pattern in the expression
Pick the matching formula
After transforming, combine like terms
Several formulas in one exercise block.
Expression transformation
(x+3)2(x3)2(x+3)^2-(x-3)^2
=12x=12x
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