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Mathematics 9 Online
OpenStudy (anonymous):

(x+2)(x-2)

OpenStudy (anonymous):

x^2 - 4 =0 x= 2 x=-2

OpenStudy (anonymous):

its perfect square trinomials

OpenStudy (anonymous):

using the formula (a+b)(a-b) = a^2-b^2

OpenStudy (anonymous):

its perfect square trinomials

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