$\,-4\;(\,x\,-9) = $   ?

$\,-4\,\,x +\,9$ $\,-4\,\,x +\,36$ $\,-4\,\,x \,-36$ $\,4\,\,x \,-13$ $\,-4\,\,x \,-9$ $\,-3\,\,x \,-13$

$\,6\,y\;(\,8\,y+\,9\,x) = $   ?

$\,-48\,\,y^2 +\,15\,\,x\,y$ $\,48\,\,y^2 +\,54\,x$ $\,48\,\,y^2 \,-54\,x$ $\,48\,\,y^2 +\,54\,\,x\,y$ $\,14\,\,y^2 +\,15\,\,x\,y$ $\,48\,\,y^2 +\,9\,x$

$\,4\,a\;(\,-4\,a+\,8) = $   ?

$\,-16\,\,a^2 +\,32\,\,a$ $\,16\,\,a^2 +\,12\,\,a$ $\,-16\,\,a^2 +\,8$ $\,-16\,\,a^2 \,-32$ $\,0\,\,a^2 +\,12\,\,a$ $\,-16\,\,a^2 +\,32$

$(\,4\,-5\,x)\;(\,2+\,4\,x) = $   ?

$\,20\,\,x^2 \,-26\,\,x +\,8$ $\,-20\,\,x^2 +\,6\,\,x +\,8$ $\,-20\,\,x^2 \,-26\,\,x \,-8$ $\,-20\,\,x^2 \,-6\,\,x +\,8$

$(\,2\,-\,t)\;(\,-1\,-\,x) = $   ?

$\,-2 \,-2\,\,x +\,\,t \,-\,\,t\,x$ $\,-2 +\,2\,\,x +\,\,t +\,\,t\,x$ $\,-2 \,-2\,\,x +\,\,t +\,\,t\,x$ $\,2 \,-2\,\,x +\,\,t +\,\,t\,x$

$(\,2\,y\,-3)\;(\,-5+\,y) = $   ?

$\,2\,\,y^2 \,-13\,\,y +\,15$ $\,-2\,\,y^2 \,-13\,\,y +\,15$ $\,2\,\,y^2 \,-7\,\,y +\,15$ $\,-2\,\,y^2 +\,7\,\,y +\,15$

$(-11+5y)(-11-5y) = $   ?

$-121 \,- 25\,y^2$ $-11 \,- 5y$ $-22 \,- 25\,y^2$ $121 \,- 25\,y^2$

Quelle est l'expression factorisée de $\,8\,\,x\;+\,9\,\,x^2$ ?

$\,x\;(\,8\;+\,x)$ $\,x\;(\,8\;+\,9\,\,x^2)$ $\,x\;(\,8\;+\,8\,x)$ $\,x\;(\,8\;+\,9\,x)$

Quelle est l'expression factorisée de $\,54\;\,-9\,\,b$ ?

$\,9\;(\,6\;+\,b)$ $\,9\;(\,6\;\,-9\,b)$ $\,9\;(\,6\,b\;\,-9)$ $\,9\;(\,6\;\,-\,b)$

Factoriser l'expression :

$(\,x \,-7)(\,-3\,y \,-9)+(\,-6\,y \,-3)(\,x \,-7)$

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