exam Maths Puzzle Numerical Ability

find all roots of the polynomial x^3-x^2+16-16

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exam Other Question

if there is 100,000 pounds of jelly beans a day then how can there be 800 in a pound? I need help finding the vertex of the parabola. And then must sketch the graph.

The problem is: y=-x^2+2x-6

I am assuming the ^ means sq? I have tried to do y=(x-h)^2+k bu