Question

# Explain why x^4 – 2x^2 – 3 is a quadratic polynomial.

Polynomials
Explain why $$x^4 – 2x^2 – 3$$ is a quadratic polynomial.
$$x^4 – 2x^2 – 3$$ is a quadratic polinomial because it is in the form of $$ar^2 + br + c$$ Let $$r = x^2$$ Then we have$$r^2 – 2r – 3$$