exam Maths Puzzle Numerical Ability

Find a rational zero of the polynomial function and use it to find all the zeros of the function.

f(x) = x to the third power + 4x to the second - x - 4

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exam Other Question

compute the arthmetic mean for the following data, to 2 decimal places of significance: 8,2.2,25,7,-9,10,2, and 5.9 Use the indicated property to write an expression that is equivalent to the following expression.
(7 • 5)•2 (associative property of multiplication)