Question 1: Calcule \(7x \times 4\).

\(28 + x\)
\(28x\)
\(28 - x\)

Question 2: Développe \(9x \times 4x\).

\(36x^2\)
\(13x\)
\(36x\)

Question 3: Développe \(6(7x + 3)\).

\(42x + 18\)
\(18x + 42\)
\(42x - 18\)

Question 4: Factorise \(12x + 18\).

\(6(2x + 3)\)
\(3(4x + 6)\)
\(10(1.2x + 1.8)\)

Question 5: Réduis l'expression \(6x + 4y + 2x + 3y\).

\(8x + 7y\)
\(6x + 7y\)
\(8x + 3y\)

Question 6: Développe \(3(9x - 4)\).

\(27x - 12\)
\(27x - 14\)
\(27x + 12\)

Question 7: Factorise \(x^2 + 3x\).

\(x(x + 3)\)
\(x^2 + 3\)
\(x(x - 3)\)

Question 8: Développe \(5(3x + 4)\).

\(15x + 20\)
\(20x + 15\)
\(15x - 20\)

Question 9: Réduis l'expression \(9x + 6y + 3x + 2y\).

\(12x + 7y\)
\(12x + 8y\)
\(9x + 8y\)

Question 10: Factorise \(20x + 15\).

\(5(4x + 3)\)
\(3(5x + 10)\)
\(10(2x + 1.5)\)