exam Maths Puzzle Numerical Ability

hello please help me solve {{{2x^2-9}}}

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exam Other Question

1. Find the product of (x^2 - 3x + 5) with the quotient of (18x^6 - 27x^5 - 9x^3) ÷ 9x3.

thank you so much for your valuable help.
x^2 – 16x + 63