Answer:
![x^(2) -64 = 0\\](https://img.qammunity.org/2021/formulas/mathematics/high-school/4iaegt1p8vtb1e4b4op6k99vj59mnwpduj.png)
Explanation:
According to Wikipedia In algebra, a quadratic equation is any equation that can be rearranged in standard form as where x represents an unknown, and a, b, and c represent known numbers, where a ≠ 0. If a = 0, then the equation is linear, not quadratic, as there is no term.