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Question Number 159759 by SANOGO last updated on 21/Nov/21

	Answered by puissant last updated on 21/Nov/21

	$S o i t x c e t t e l a r g e u r . .$ $e n e f f e t, l a l o n g u e u r r e s t a n t e e s t$ $4 - x e t l a l a r g e u r r e s t a n t e e s t 3 - x$ $A i n s i l^{'} a i r e r e s t a n t e e s t (4 - x) (3 - x)$ $\Rightarrow A_{r} = x^{2} - 7 x + 12 D e p l u s, l e s d e u x a i r e s$ $s o n t e g a l e s d o n c l^{'} a i r e t o t a l e e s t A = 4 \times 3 = 12$ $d o n c l^{'} a i r e d e l a r e s t a n t e e s t A_{r} = \frac{12}{2} = 6$ $o n a d o n c x^{2} - 7 x + 12 = 6$ $\Rightarrow x^{2} - 7 x + 6 = 0 \to (x - 1) (x - 6) = 0$ $\Rightarrow x = 1 o u x = 6 A i n s i, r e c i p r o q u e m e n t$ $o n v e r i f i e q u e x = 1 . . .$ $D^{'} o u l a l a r g e u r c o m m u n e e s t 1 . . . ★$
	Commented by SANOGO last updated on 21/Nov/21

	$l e s g e n i e s$
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