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Mathematics 19 Online
OpenStudy (anonymous):

(-7-i)(-7+i)

hartnn (hartnn):

u know what 'i' here is ? also use this : (a+b)(a-b)=a^2-b^2 put a=-7 and b=i

hartnn (hartnn):

@naemac could u simplify your expression? or u need more help ?

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