exam Maths Puzzle Numerical Ability

i dont know how to solve this problem so that i get the equation of an ellipse
4x^2+9y^2+16x-18y-11=0

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exam Other Question
(3/4x^2y^-2)(2/3x^5y^8) Find the value of k that will make the roots of kx^2+4x+12=0