$\,-3\;(\,9\,b\,-3) = $   ?

$\,-27\,\,b +\,9$ $\,-27\,\,b \,-3$ $\,6\,\,b \,-6$ $\,-27\,\,b \,-9$ $\,-27\,\,b +\,3$ $\,-27\,\,b \,-6$

$\,4\,x\;(\,-9\,x+\,9\,y) = $   ?

$\,-5\,\,x^2 +\,13\,\,x\,y$ $\,-36\,\,x^2 +\,9\,y$ $\,-36\,\,x^2 +\,36\,\,x\,y$ $\,36\,x +\,36\,\,x\,y$ $\,-36\,\,x^2 +\,13\,\,x\,y$ $\,-36\,\,x^2 \,-36\,y$

$\,6\,t\;(\,-5\,t\,-8) = $   ?

$\,\,t^2 \,-2\,\,t$ $\,-30\,\,t^2 \,-48\,\,t$ $\,-30\,\,t^2 \,-2$ $\,-30\,\,t^2 +\,48$ $\,-30\,\,t^2 \,-8$ $\,30\,\,t^2 \,-48$

$(\,6\,a+\,3)\;(\,-3+\,a) = $   ?

$\,6\,\,a^2 \,-21\,\,a \,-9$ $\,6\,\,a^2 \,-15\,\,a \,-9$ $\,-6\,\,a^2 \,-15\,\,a +\,9$ $\,6\,\,a^2 +\,21\,\,a \,-9$

$(\,2\,-6\,b)\;(\,-\,a\,-4) = $   ?

$\,-2\,\,a +\,8 \,-6\,\,a\,b +\,24\,\,b$ $\,-2\,\,a \,-8 +\,6\,\,a\,b +\,24\,\,b$ $\,2\,\,a +\,8 +\,6\,\,a\,b +\,24\,\,b$ $\,2\,\,a \,-8 \,-6\,\,a\,b +\,24\,\,b$

$(\,6+\,5\,y)\;(\,-2\,y\,-3) = $   ?

$\,-10\,\,y^2 \,-3\,\,y +\,18$ $\,-10\,\,y^2 +\,3\,\,y +\,18$ $\,10\,\,y^2 +\,3\,\,y \,-18$ $\,-10\,\,y^2 \,-27\,\,y \,-18$

$(-2x+10)(-2x-10) = $   ?

$-4\,x^2 \,- 100$ $4\,x^2\, -40\,x\,+ 100$ $4\,x^2 \,- 100$ $4x \,- 100$

Quelle est l'expression factorisée de $\,5\,\,b\;+\,2\,\,b^2$ ?

$\,b\;(\,5\;+\,2\,^{2})$ $\,b\;(\,5\;+\,2\,b)$ $\,b\;(\,5\;+\,b)$ $\,b\;(\,5\;+\,b)$

Quelle est l'expression factorisée de $\,-36\,\,x\;+\,6$ ?

$\,6\;(\,-6\,x\;+\,1)$ $\,6\;(\,-6\;+\,6\,x)$ $\,6\;(\,6\,x\;+\,1)$ $\,6\,x\;(\,-6\,x\;+\,1)$

Factoriser l'expression :

$(\,2\,x \,-4)(\,4\,y +\,2)+(\,-8\,y +\,6)(\,2\,x \,-4)$

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