exam Maths Puzzle Numerical Ability

what would this answer be F (x)=-x^3+3x^2-a2+6

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exam Other Question

Build the rational expression into an equivalent rational expression with the indicated denominator.

y/2 = ?/2y
4x9-3

over

7+3x(-4)
with () outside of eqution...
but outside of the () is 3/2.

For the 4x9-3
over
7+3x(-4) i got 32/-40 which simplified to 5/4...but