Question 821292
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Hi,
f(x)=x^3+9x^2-36x-324 
f(x)=x^2(x+9)-36(x+9) ***
f(x) = (x^2-36)(x+9)
If f(x) = (x-6)(x+6)(x+9)= 0
     x is -9, -6,  6