define bi-quadratic polynomial.i need a short answer.definition
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define bi-quadratic polynomial.i need a short answer.definition
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Example. Solve equation `x^4+4x^2-21=0`.
Let `x^2=y`, then we obtain quadratic equation `y^2+4y-21=0`. Solutions of this equation are x=-7 and x=3.
Answer:
Step-by-step explanation:
The degree four (quartic case) is the highest degree such that every polynomial equation can be solved by radicals.