editions:UOMDLPabq7928_0001_001 - Βιβλία Google

That is, the square of the sum of two numbers is equal to the square of the first number, plus twice the product of the two numbers, plus the square of the second number.

Higher Arithmetic: Designed for the Use of High Schools, Academies, and ... - Σελίδα 309
των George Roberts Perkins - 1851 - 342 σελίδες
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Midland Medical Miscellany and Provincial Medical Journal, Τόμος 3

1884 - 516 σελίδες

...actually proved it by experiment, it is impossible for him to understand the formula, for instance, that the square of the sum of two numbers is equal to the sum of their squares together with twice their product. A very simple experiment, however, impresses...

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