exam Maths Puzzle Numerical Ability

1)12xy^2-108x

2)3a^3b^2+81b^2

3)3x^4-48

4)2x^4+x^2-3

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exam Other Question

Hi, I need help solving this problem on reducing rational expressions:

x^2-2xy+y^2/x^2-y^2

Thanks! 1.) 4x2+4y2+4y=15

Please include
a) standard equation form
b) center
c) name of the major axis and length of major axis
d) name of the minor axis and length of minor axis