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OpenStudy (anonymous):
simplify completely 12 X +36/ x^2-4X -21 and find the restrictions on the variable
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OpenStudy (campbell_st):
well factor the numerator and denominator \[\frac{12(x + 3)}{(x + 3)(x - 7)}\] remove the common factor the restrictions are the values of x that make the denominator zero. they should be easy to find now the quadratic has been factored.
OpenStudy (anonymous):
I dont quite understand what to do
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