Question

Write as a quadratic in x. Never been told what this is?

Answer 1

Anyway need to write x^2 - 6xy + (25y^2 -16) = 0 as a quadratic in x

Answer 2

i think it means write as
\[ax^2+bx+c=0\] for some \(a,b,c\)
they will obviously include \(y\)'s