exam Maths Puzzle Numerical Ability

I need help solving this equation: x^2 - 2x = 8. I get -2x(x+4) thank you for your help

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exam Other Question

write a polynomial of the 5th degree that has the given numbers as its zeros: -2, -1, 0, -2i. multiply all factors out, do not leave in factored form. Evaluate each of the following logarithms.
a) logbase7 256
b) logbase3/4 6475