bonjour
si ABC est rectangle en A , on a
( x + 1 )² = 2 ² + ( x - 2 )²
x² + 2 x + 1 = 4 + x² - 4 x + 4
x² + 2 x - x² + 4 x = 4 - 1
6 x = 3
x = 3/6 = 1/2
il est rectangle quand x = 1/2 cm
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bonjour
si ABC est rectangle en A , on a
( x + 1 )² = 2 ² + ( x - 2 )²
x² + 2 x + 1 = 4 + x² - 4 x + 4
x² + 2 x - x² + 4 x = 4 - 1
6 x = 3
x = 3/6 = 1/2
il est rectangle quand x = 1/2 cm