exam Maths Puzzle Numerical Ability

(3/4x^2y^-2)(2/3x^5y^8)

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exam Other Question

Multiply and Solve:

x^5 y^3/x^2+13x+30 multiplied by x^2+2x-3/x^7y^2

Thanks !!!! 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