Question

Asked Dec 12, 2019

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Solve the following inequalities by the most convenient method. Please show all work. Write thesolution set in interval notation.

x^{3} + 4x^{2} - 9x - 36 ≥ 0

Step 1

Factor x^3+4x^2-9x-36 completely.

Step 2

Setting (x+4)(x+3)(x-3)=0 we get x=-4, -3, 3

Step 3

Check sign of (x+4)(x+3)(x-3) in each interval.

Pick a real number in each...

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