Factor \((x^2+y^2-z^2)^2-4x^2y^2\) as the product of four polynomials of degree 1, each of which has a positive coefficient of \(x\).
So far, I've factored it out to be \((-x-y+z)(x-y+z)(-x+y+z)(x+y+z)\)but how am I supposed to factor it so that way \(x\) is always positive? Does anyone have some tips/walkthroughs on how to solve this?
Thanks
