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A boy who has forgotten every mere verbal rule both of arithmetic and algebra, will remember the formula, x^2 + 2xy + y^2, just as perfectly and on the same principle, as he will remember the face of the man who taught it to him. It is something which he has seen. Why has geometry in all ages been found to be of such peculiar value as a means of intellectual training?
They also shone in sitting-rooms, where boys looked fiercely at "X2 +2Xy+y2," mothers placidly darned stockings, and fathers, Weekly Examiner in hand, patiently struggled to disengage from "boiler-plate" and bogus news about people snatched from the jaws of death by the timely use of Dr.
Many a man is bitterly disillusioned after marriage when he realises that his wife cannot solve a quadratic equation, and that he is compelled to spend all his days with a woman who does not know that X squared plus 2XY plus Y squared is the same thing, or, I think nearly the same thing, as X plus Y squared. "Nor should the simple domestic virtues be neglected.
Then and there he shot her deftly with a paper wad, chewed and fired through a cane pipe-stem, and waited till she wiped it off her cheek with her apron and made a face at him, before he plunged into the mysteries of x2 + 2xy + y2. And thus another old story began, as new and as fresh as when Adam and Eve walked together in the garden.
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