Factoriser, si possible, les expressions suivantes :
- a. \( 3(x+1) + 5(x-1) \)}
- b. \( 3(x+1) - 2(x+1) - (x-1) \)}
- c. \( x^2 + 5 \times (-5) \)}
- d. \( (2-x)(2+x) - 5(2-x) + (-x+1)(x-2) \)}
- e. \( x(x+1) - x^2 + 5x \)}
- f. \( x(x-1) - x^2 + 2x - 1 \)}
- g. \( 3(x-2) + (x+2)(2-x) \)}
- h. \( (6x-9)(x+1) - (4x-6) \)}
-i. \( (2x + 3)(1 - x) + (4x + 6)^2 \)}
-j. \( (3 - 9x)^2 + 3(3x - 1) \)}
-k. \( (5x + 1)(2x - 4) + (3x - 6)^2 \)}
