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Mathematics 20 Online
OpenStudy (anonymous):

(2x-5)(2x+5)

OpenStudy (anonymous):

\[(a-b)(a+b)=a ^{2}-b ^{2}\]

OpenStudy (anonymous):

2x * 2x = 4x^2 2x * 5 = 10x -5 * 2x = -10x -5 * 5 = -25 Combine like terms

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