book Maths Puzzle Numerical Ability

x3 for x=-5

-2m+4n2 for m=-6 and n=-2

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book Other Question

Rewrite the equation 2x+4y+2=3y+5 in general form If f(x) = x(x – 1)(x – 4)^2, use interval notation to give all values of x
where f(x) > 0.