$\,-2\;(\,-8\,t\,-4) = $   ?

$\,-10\,\,t \,-6$ $\,16\,\,t \,-6$ $\,16\,\,t +\,4$ $\,16\,\,t \,-8$ $\,16\,\,t +\,8$ $\,16\,\,t \,-4$

$\,-5\,a\;(\,-\,b+\,6) = $   ?

$\,-5\,b \,-\,\,a$ $\,5\,b \,-30\,\,a$ $\,-6\,\,a\,b +\,\,a$ $\,5\,\,a\,b +\,6$ $\,5\,\,a\,b +\,30$ $\,5\,\,a\,b \,-30\,\,a$

$\,3\,a\;(\,6\,a+\,8\,b) = $   ?

$\,-18\,\,a^2 +\,24\,b$ $\,18\,\,a^2 +\,11\,\,a\,b$ $\,18\,\,a^2 \,-24\,b$ $\,18\,\,a^2 +\,8\,b$ $\,9\,\,a^2 +\,11\,\,a\,b$ $\,18\,\,a^2 +\,24\,\,a\,b$

$\,5\,b\;(\,2\,b+\,a) = $   ?

$\,10\,\,b^2 \,-5\,a$ $\,10\,\,b^2 +\,6\,\,a\,b$ $\,7\,\,b^2 +\,6\,\,a\,b$ $\,10\,\,b^2 +\,a$ $\,10\,\,b^2 +\,5\,\,a\,b$ $\,-10\,b +\,5\,\,a\,b$

$(\,t+\,3)\;(\,4\,t\,-2) = $   ?

$\,4\,\,t^2 \,-10\,\,t \,-6$ $\,4\,\,t^2 \,-14\,\,t \,-6$ $\,4\,\,t^2 \,-14\,\,t +\,6$ $\,4\,\,t^2 +\,10\,\,t \,-6$

$(\,1\,-\,t)\;(\,-4\,-\,x) = $   ?

$\,4 \,-\,\,x \,-4\,\,t +\,\,t\,x$ $\,-4 \,-\,\,x +\,4\,\,t +\,\,t\,x$ $\,-4 \,-\,\,x \,-4\,\,t \,-\,\,t\,x$ $\,-4 \,-\,\,x \,-4\,\,t +\,\,t\,x$

$(\,6\,b\,-6)\;(\,b\,-5) = $   ?

$\,-6\,\,b^2 +\,24\,\,b +\,30$ $\,6\,\,b^2 \,-36\,\,b \,-30$ $\,6\,\,b^2 \,-36\,\,b +\,30$ $\,-6\,\,b^2 \,-24\,\,b +\,30$

Quelle est l'expression factorisée de $\,3\,\,b\;+\,8\,\,b^2$ ?

$\,b\;(\,3\;+\,8\,\,b^2)$ $\,b\;(\,3\;+\,8\,^{2})$ $\,b\;(\,3\;+\,8\,b)$ $\,b\;(\,3\,b\;+\,8)$

Quelle est l'expression factorisée de $\,-14\;+\,35\,\,y$ ?

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

Quelle est l'expression factorisée de $\,6\,\,a^2\;\,-24\,\,a\,b$ ?

$\,6\,a\;(\,a\;\,-4\,\,a\,b)$ $\,6\,a\;(\,a\;+\,4\,b)$ $\,6\,\,a^2\;(\,1\;\,-4\,b)$ $\,6\,a\;(\,a\;\,-4\,b)$