Révisions de 3e

Calcul algébrique (2)




5(x - 3)(2x + 1) = (5x - 15)(10x + 5)
x² + 3x² = 4x²
x - 2(x - 1) = -x -2
2(x + 4)(x + 2) + (x + 4) = (x + 4) (2x + 4)
si -2x = 0 alors x = -1/2
si -3x + 7 = 6x - 3 alors x = 10/9