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Mathematics 7 Online
OpenStudy (anonymous):

Identify the factors of \(x^2 - 4x - 21\) \(\huge\ddot\smile\) (x - 7)(x + 3) (x + 7)(x - 3) (x + 21)(x - 1) (x - 21)(x + 1)

hartnn (hartnn):

what do u think ?

hartnn (hartnn):

2 numbers with sum = -4 and product = -21 are ?

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