$\,-6\;(\,4\,-2\,t) = $   ?

$\,-24 \,-2\,t$ $\,-2 \,-8\,\,t$ $\,-24 +\,12\,\,t$ $\,-24 \,-12\,\,t$ $\,-24 +\,2\,\,t$ $\,-24 \,-8\,t$

$\,-2\,t\;(\,7\,x+\,1) = $   ?

$\,14\,x +\,\,t$ $\,5\,\,t\,x \,-\,\,t$ $\,-14\,\,t\,x +\,2$ $\,-14\,\,t\,x \,-2\,\,t$ $\,-14\,x \,-2\,\,t$ $\,-14\,\,t\,x +\,1$

$\,2\,b\;(\,8\,b+\,3\,a) = $   ?

$\,-16\,\,b^2 +\,5\,\,a\,b$ $\,10\,\,b^2 +\,5\,\,a\,b$ $\,16\,\,b^2 \,-6\,a$ $\,16\,b +\,6\,\,a\,b$ $\,16\,\,b^2 +\,3\,a$ $\,16\,\,b^2 +\,6\,\,a\,b$

$\,6\,y\;(\,-\,y\,-5\,x) = $   ?

$\,-6\,\,y^2 +\,30\,x$ $\,5\,\,y^2 +\,\,x\,y$ $\,6\,\,y^2 +\,x$ $\,-6\,\,y^2 \,-5\,x$ $\,-6\,\,y^2 \,-30\,\,x\,y$ $\,-6\,y \,-30\,\,x\,y$

$(\,6+\,4\,y)\;(\,3\,y\,-1) = $   ?

$\,12\,\,y^2 +\,14\,\,y +\,6$ $\,12\,\,y^2 +\,22\,\,y \,-6$ $\,-12\,\,y^2 +\,22\,\,y \,-6$ $\,12\,\,y^2 +\,14\,\,y \,-6$

$(\,x\,-4)\;(\,-3\,-\,y) = $   ?

$\,3\,\,x +\,\,x\,y +\,12 +\,4\,\,y$ $\,-3\,\,x +\,\,x\,y +\,12 +\,4\,\,y$ $\,-3\,\,x \,-\,\,x\,y +\,12 \,-4\,\,y$ $\,-3\,\,x \,-\,\,x\,y +\,12 +\,4\,\,y$

$(\,5\,-\,y)\;(\,-2+\,6\,y) = $   ?

$\,-6\,\,y^2 +\,32\,\,y \,-10$ $\,-6\,\,y^2 +\,32\,\,y +\,10$ $\,6\,\,y^2 +\,28\,\,y \,-10$ $\,6\,\,y^2 +\,32\,\,y \,-10$

Quelle est l'expression factorisée de $\,2\,\,y^2\;+\,7\,\,y$ ?

$\,y\;(\,2\,y\;+\,6)$ $\,y\;(\,2\;+\,7\,y)$ $\,y\;(\,2\,y\;+\,7\,\,y)$ $\,y\;(\,2\,y\;+\,7)$

Quelle est l'expression factorisée de $\,35\;\,-14\,\,t$ ?

$\,7\;(\,5\;\,-2\,t)$ $\,7\;(\,5\;+\,2\,t)$ $\,7\,t\;(\,5\;\,-2\,t)$ $\,7\;(\,-5\;+\,2\,t)$

Quelle est l'expression factorisée de $\,-36\,\,a\,b\;+\,28\,\,b^2$ ?

$\,4\,b\;(\,9\,a\;\,-7\,b)$ $\,4\,b\;(\,-9\,a\;+\,7\,b)$ $\,4\,b\;(\,9\,a\;+\,7\,b)$ $\,4\,b\;(\,-9\,a\;+\,28\,b)$