exam Maths Puzzle Numerical Ability

Solve (x + 5)^2 = 3

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A rodent population has moved into a new commercial development area in the city. The population initially had 16 animals and displayed an exponential rate of growth. After 486 wee I hope I am in the right section but I am completly loss with this.

If f(x)=x(x-1)(x-4)^2, use interval notation to give all values of x where f(x)>0.

a. (-infinity,0)U(4,inf