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Mathematics 20 Online
OpenStudy (anonymous):

(x-5)(x+5)

OpenStudy (anonymous):

x^2-25

OpenStudy (anonymous):

here you would expand \[(x-5)(x+5)\]

OpenStudy (anonymous):

so you would get \[x*x + 5*x - 5*x -5*5\] = \[x^2 + 5*x -5*x -25\] = \[x^2 - 25\]

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