Sagot :
bonjour
( x - 3 ) ( 2 x + 7 ) ≤ ( 2 x - 6 ) ( x + 5 )
( x - 3 ) ( 2 x + 7 ) - (2 x - 6 ) ( x + 5 ) ≤ 0
( x - 3 ) ( 2 x + 7) - 2 ( x - 3) ( x + 5 ) ≤ 0
( x - 3 ) ( 2 x + 7 - 2 x - 10 ) ≤ 0
- 3 ( x - 3 ) ≤ 0
x - 3 ≤ 0
x ≥ 3
[ 3 ; + ∞ [
bonjour
( x - 3 ) ( 2 x + 7 ) ≤ ( 2 x - 6 ) ( x + 5 )
( x - 3 ) ( 2 x + 7 ) - (2 x - 6 ) ( x + 5 ) ≤ 0
( x - 3 ) ( 2 x + 7) - 2 ( x - 3) ( x + 5 ) ≤ 0
( x - 3 ) ( 2 x + 7 - 2 x - 10 ) ≤ 0
- 3 ( x - 3 ) ≤ 0
x - 3 ≤ 0
x ≥ 3
[ 3 ; + ∞ [