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To solve a polynomial inequality, we factor the polynomial into irreducible factors and find all the real ( ---Select--- of the polynomial. Then we find the intervals determined by the real ---Select-- + ) and use test points in each interval to find the sign of the polynomial on that interval. Let P(x) = x(x + 8)(x - 1). Fill in the diagram below to find the intervals on which P(x) 2 0. Sign of -8 0 1 X ? + ? + ? + ? + x +8 ?+ ? + ?+ X - 1 ?+ x(x + 8)(x - 1) ? + From the diagram above we see that P(x) 2 0 on the intervals (Enter your answer using interval notation.)