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| ¹Ñè¹ | ¾×é¹ | + | 4 (¾×é¹ ) | = | ¾×é¹ |
| c2 | + | 4 (ab/2) | = | (a + b)2 | |
| c2 | + | 2ab | = | a2 + 2ab + b2 | |
| c2 | = | a2 + b2 |
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¾×é¹
¾×é¹
¾×é¹
¹Ñè¹ ¾×é¹ + 4 (¾×é¹ )=
¾×é¹ c2 + 4 (ab/2) = (a + b)2 c2 + 2ab = a2 + 2ab + b2 c2 = a2 + b2