exam Maths Puzzle Numerical Ability

Please help sketch the graph and name the conic section with equation:
4x^2-16x+9y^2+18y=0 So far I have factored out the 4 and 9. What comes next?Thank you

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exam Other Question
f(x)=x(x+3)(x-1) use interval notation to give all values of x where f(x)>0 3x-18=3x+2