bonsoir
1(x-3) = 0
x - 3 = 0
x = 3
(3x + 1) (1-2x) = 0
x = - 1/3 ou 1/2
(3x-7)² = 0
x = 7/3
(x-1) (2x + 3) - (x - 1) (5-4x) = 0
( x - 1 ) ( 2 x + 3 - 5 + 4 x ) = 0
( x - 1 ) ( 6 x - 2 ) = 0
x = 1 ou 1/3
(3x-7)²-(1-5x) (3x-7)= 0
( 3 x - 7 ) ( 3 x - 7 - 1 + 5x ) = 0
( 3 x - 7 ) ( 8 x - 8 ) = 0
8 ( 3 x - 7 ) ( x - 1 ) = 0
x = 7/3 ou 1
25x²-9=0
( 5 x - 3 ) ( 5 x + 3 ) = 0
x = 3/5 ou - 3 /5
81-36x² = 0
( 9 - 6 x ) ( 9 + 6 x ) = 0
x = 9/6 ou - 9 /6 = 3/2 ou - 3 /2
x²-7= 0
x² = 7
x = √7 ou - √7
3x²-5=0
3 x² = 5
x² = 5/3
x = √5/3 ou - √5/3
9x² + 7 = 0
9 x² = - 7 ⇒ pas de solution
2-5x² = 0
- 5 x² = - 2
5 x² = 2
x² = 2 /5
x = √2/5 ou - √2/5
(3x + 7)² - x² = 0
4x² - (2x + 5)² = 0.
( 2 x + 2 x + 5 ) ( 2 x - 2 x - 5 ) = 0
( 4 x + 5 ) ( - 5 ) = 0
x = - 5/4
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bonsoir
1(x-3) = 0
x - 3 = 0
x = 3
(3x + 1) (1-2x) = 0
x = - 1/3 ou 1/2
(3x-7)² = 0
x = 7/3
(x-1) (2x + 3) - (x - 1) (5-4x) = 0
( x - 1 ) ( 2 x + 3 - 5 + 4 x ) = 0
( x - 1 ) ( 6 x - 2 ) = 0
x = 1 ou 1/3
(3x-7)²-(1-5x) (3x-7)= 0
( 3 x - 7 ) ( 3 x - 7 - 1 + 5x ) = 0
( 3 x - 7 ) ( 8 x - 8 ) = 0
8 ( 3 x - 7 ) ( x - 1 ) = 0
x = 7/3 ou 1
25x²-9=0
( 5 x - 3 ) ( 5 x + 3 ) = 0
x = 3/5 ou - 3 /5
81-36x² = 0
( 9 - 6 x ) ( 9 + 6 x ) = 0
x = 9/6 ou - 9 /6 = 3/2 ou - 3 /2
x²-7= 0
x² = 7
x = √7 ou - √7
3x²-5=0
3 x² = 5
x² = 5/3
x = √5/3 ou - √5/3
9x² + 7 = 0
9 x² = - 7 ⇒ pas de solution
2-5x² = 0
- 5 x² = - 2
5 x² = 2
x² = 2 /5
x = √2/5 ou - √2/5
(3x + 7)² - x² = 0
4x² - (2x + 5)² = 0.
( 2 x + 2 x + 5 ) ( 2 x - 2 x - 5 ) = 0
( 4 x + 5 ) ( - 5 ) = 0
x = - 5/4