show that (x+4),(x-3) and (x-7) are factors of x^3-6x^2-19x+84.
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bro first assume f(x) = x^3-6x^2-19x+84
then put x=-4 in f(x), if it comes out to be zero then (x+4) is a factor of f(x)
similarly do with the other two factors i.e. (x-3) and (x-7)
Step-by-step explanation:
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