$\,-2\;(\,-3\,b\,-6) = $   ?

$\,6\,\,b +\,12$ $\,6\,\,b \,-6$ $\,6\,\,b \,-12$ $\,6\,\,b \,-8$ $\,6\,\,b +\,6$ $\,-5\,\,b \,-8$

$\,-6\,a\;(\,2+\,8\,b) = $   ?

$\,-12\,\,a +\,48\,b$ $\,-4\,\,a +\,2\,\,a\,b$ $\,-12\,\,a +\,8\,b$ $\,12 \,-48\,\,a\,b$ $\,-12 \,-2\,\,a\,b$ $\,-12\,\,a \,-48\,\,a\,b$

$\,2\,a\;(\,7\,a+\,4\,b) = $   ?

$\,14\,\,a^2 +\,4\,b$ $\,14\,\,a^2 +\,8\,b$ $\,14\,\,a^2 +\,8\,\,a\,b$ $\,-14\,\,a^2 +\,6\,\,a\,b$ $\,14\,\,a^2 \,-8\,b$ $\,9\,\,a^2 +\,6\,\,a\,b$

$\,4\,x\;(\,5\,x+\,2\,y) = $   ?

$\,20\,x +\,8\,\,x\,y$ $\,20\,\,x^2 +\,2\,y$ $\,9\,\,x^2 +\,6\,\,x\,y$ $\,-20\,\,x^2 +\,6\,\,x\,y$ $\,20\,\,x^2 +\,8\,\,x\,y$ $\,20\,\,x^2 \,-8\,y$

$(\,b+\,6)\;(\,6\,-\,b) = $   ?

$\,-\,\,b^2 \,-12\,\,b +\,36$ $\,-\,\,b^2 +\,36$ $\,-\,\,b^2 \,-12\,\,b \,-36$ $\,-\,\,b^2 +\,36$

$(\,2\,-6\,b)\;(\,-6\,-4\,a) = $   ?

$\,12 +\,8\,\,a +\,36\,\,b +\,24\,\,a\,b$ $\,-12 \,-8\,\,a +\,36\,\,b +\,24\,\,a\,b$ $\,-12 +\,8\,\,a +\,36\,\,b \,-24\,\,a\,b$ $\,-12 \,-8\,\,a +\,36\,\,b \,-24\,\,a\,b$

$(\,2\,b+\,3)\;(\,-4\,-\,b) = $   ?

$\,-2\,\,b^2 +\,5\,\,b +\,12$ $\,-2\,\,b^2 \,-11\,\,b \,-12$ $\,2\,\,b^2 +\,5\,\,b \,-12$ $\,-2\,\,b^2 +\,11\,\,b \,-12$

Quelle est l'expression factorisée de $\,9\,\,t\;+\,7\,\,t^2$ ?

$\,t\;(\,9\;+\,7\,^{2})$ $\,t\;(\,9\;+\,7\,\,t^2)$ $\,t\;(\,9\;+\,6\,t)$ $\,t\;(\,9\;+\,7\,t)$

Quelle est l'expression factorisée de $\,-6\;+\,8\,\,b$ ?

$\,2\;(\,3\;+\,4\,b)$ $\,2\;(\,3\;\,-4\,b)$ $\,2\,b\;(\,-3\;+\,4\,b)$ $\,2\;(\,-3\;+\,4\,b)$

Quelle est l'expression factorisée de $\,-4\,\,t^2\;+\,10\,\,t\,y$ ?

$\,2\,t\;(\,-2\,t\;+\,10\,y)$ $\,2\,t\;(\,-2\,y\;+\,10\,t)$ $\,2\,t\;(\,-2\,t\;+\,5\,y)$ $\,2\,t\;(\,2\,t\;\,-5\,y)$