exam Maths Puzzle Numerical Ability

Please help me to solve homework question. Find one factor for each polynomial.

How to solve for answer? Thanks!

-18x^3+72x

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exam Other Question

A fruit salad is made up of cantaloupe, strawberries, and bananas. If a salad weighing 135 oz. contains 3oz. of bananas for every oz. of strawberries and has the same number of cantaloupe as strawberries, how many oz. of banana are in the salad? Suppose it costs $5 to enter a carnival. Each ride costs $1.25. You have $15 to spend at the carnival. What is the greatest number of rides that you can go on?