exam Maths Puzzle Numerical Ability

Please Help.
(x+12)(x-1)(x+6)>0

Solve. what is the solution set?

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exam Other Question

Paperback books are on sale for $3.95 each including tax. Explain how you could use the Distributive Property to mentally calculate the total cost of buying 7 paperback books. How do you calculate the positive 4th root of 7?
Thanks!
Daniel