Maybe two-datics? As examples: twin, twine two threads intertwined , twixt, twilight, and the number two itself! Quadratic equations are intimately connected with problems about squares and quadrangles another name for rectangles.
In fact, the word quadratic is derived from the Latin word quadratus for square. For example, consider the problem:. A quadrangle has one side four units longer than the other. Julius Stieglitz. The Book of Curiosities I. Amusements in Mathematics Henry Ernest Dudeney. Also called: quadratic equation an equation containing one or more terms in which the variable is raised to the power of two, but no terms in which it is raised to a higher power. It is used in algebra to calculate the roots of quadratic equations.
All rights reserved. Quad is simply an English shortening of quadrangle , quadruplet etc. So quadri- and quad are actually the same word. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Learn more. Ask Question. Asked 7 years, 9 months ago. Active 5 years, 11 months ago. Viewed 26k times. Improve this question.
Dapeng Gao. Dapeng Gao Dapeng Gao 1, 2 2 gold badges 11 11 silver badges 18 18 bronze badges. Quadratic comes from "quad" meaning square; when you raise something to the second power, you square it. I can't say I've ever actually heard the word "quadric. Brain failure. Quadric is actually a second-power thing again.
0コメント