Question

Among the given polynomials equations, select the biquadratic polynomial equation(s).

Answer 1

Any polynomial having a degree \(4\) will be biquadratic.
Among the given options, we have the equations:
\(-4x^4-x^3+2x-9=0\)
\((x^2-4)(2x-x^2)=0\)
\(\&~(x-2)(2x-4)(x-4)(x+1)=0\) have degree as \(4.\)
Hence, these are all biquadratic polynomial equations.