The quadratic equation may have instilled horror in many of us .
我们很多人可能面对二次方程式会感到恐惧。
Both vegetables and quadratic polynomials are made more interesting with the mandelbrot set .
有了曼德尔勃特集合，蔬菜和二次多项式都变得有趣多了。
Readers who were paying attention in their maths classes may recall that quadratic equations often have two solutions , one positive and one negative .
