It's more than possible that I have posted this before, amnesia and old age are popular bedfellows.
Going back a few years, pre-lockdown, a tentative knock on the door, it was my neighbour. Standing there with her son, she asked: "Did I know anything about quadratic equations?" The boy looked extremely miserable, how could I not take pity on him? Remembering quads, as they were known, from way back in schooldays, I'm not that good, but I do have a rather good book to help.
At my neighbour's house I read the screen on the boy's computer, it said: "Quadratic equations are second-degree algebraic expressions and are of the form ax2 + bx + c = 0. The term "quadratic" comes from the Latin word "quadratus" meaning square, which refers to the fact that the variable x is squared in the equation. In other words, a quadratic equation is an “equation of degree 2.” The poor lad, he just couldn't grasp quadratic equations.
We had a chat, nothing about mathematics or homework. His girlfriend had called time on them, oh dear! He wasn't having a good day. Slowly I explained quads in simple English, then did a couple of easy examples. Keeping it easy I asked him what was next as we went through the problem together. In no time he had cracked it. We then looked at his homework, it was no longer a challenging: numbers on a page. He finished it.
The delighted lad looked at me and came out with a classic: "If you are so smart," he said, "how come I have to set your computer for you whenever you want something new programming?" "That's a very good question," I replied, as I collected my book and went home.