exam Maths Puzzle Numerical Ability

x^3-x^2-12x=0
This is a summer assignment that will be a major test grade when we go back to school in August. Thank you!!

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exam Other Question

Find the corresponding y values for x= -2,-1,0,1,2,3 if y=x^2-x-2.
I have tried for 2 days to make this problem work but I keep getting stuck along the way. Please help..... Someone, please help. When you simplify with a parenthesis, do you invert first. Thank you very much.

7(x^4)^5 (-4x^2)2