exam Maths Puzzle Numerical Ability

find the indicated outputs f(x)=4x^2-5x
f(0)=
f(-1)=
f(2)=

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exam Other Question

6 times the square root of x to the third power times y cubed over x times y
give this in the radical form
Solve the inequality

y _<_x + 3

Help with this equation would be appreciated:)