exam Maths Puzzle Numerical Ability

use calculator to find real zeros of. f(x)= x^3 + 6x^2-10

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exam Other Question

The quadratic function y=a(x-h)^2+k,a is less than 0,is translated nine units down. What is the range of the function? I think it is (y such that y is less than or equal to k-9,y belongs to a set of real numbers) (1+r)^3=1.560896
Solve for r.