L'énoncé
Utilisez un brouillon et vérifiez ensuite votre réponse
Question 1
Développez \(A =-4(6x-5)\)
\(A = -24x +20\)
Question 2
Développez \(B=-4(-0,2x+7)\)
\(B = 0,8x-28\)
Question 3
Développez \(C = (-8x-5)\times (-4)\)
\(C = 32x +20\)
Question 4
Développez \(D = -0,6(x+6) +0,3(3x -5)\)
\(D = -0,6x-3,6+0,9x-1,5\)
\(D =0,3x-5,1\)
Question 5
Développez \(E = 13x -8\times (1-5x)\times 2 \)
\(E = 13x-16+80x\)
\(E = 93x-16\)
Question 6
Développez \(F = -23x-5(-9-3x)\)
\(F = -23x+45+15x\)
\(F =-8x+45\)
Question 7
Développez \(G = -(5x-7)\times 3+(6-4x)\times (-2)\)
\(G = -15x+21-12+8x\)
\(G = -7x+9\)
Question 8
Développez \(H = -\dfrac{2}{3}\left( -x- \dfrac{3}{5}\right)\)
\(H = \dfrac{2}{3}x+\dfrac{2}{5}\)
Question 9
Développez \(I = (-30x+40)\times\left(\dfrac{-3}{4}\right)\)
\(I = \dfrac{90}{4} x-30\)
\(I = 22,5x-30\)
Question 10
Développez \(J = -5\left(-x-\dfrac{2}{15}\right)\times (-4)\)
\(J = -5\times (-4)\times\left(-x-\dfrac{2}{15}\right)\)
\(J =20\left(-x-\dfrac{2}{15}\right)\)
\(J =-20x-\dfrac{40}{15}\)
\(J =-20x-\dfrac{8}{3}\)