book Maths Puzzle Numerical Ability

Please help me to perform indicated operation and simplify if possible:

5x over x^2-9 minus 4 over 3-x

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book Other Question

is v(v-3) = v^2 + 6 a quadratic equation and if so what is the solution? (x-6)(x-1)
(x2+4x+3)(x-6)