exam Maths Puzzle Numerical Ability

Write the equation in the standard form forthe indicated conic section


A hyperbola with vertices (15,0) and (-15,0) and conjugate axis of lenght 4 units.

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exam Other Question
Given f(x)=-5x^4+x^3+2x^2+3x+1, and k=1, express f(x) in the form f(x)=(x-k)q(x)+r

thank you write the expression loga(y+5)+2loga(x+1) as on e logarithm