$\,-6\;(\,1\,-4\,b) = $   ?

$\,-6 \,-4\,b$ $\,-6 +\,4\,\,b$ $\,-6 \,-24\,\,b$ $\,-6 +\,24\,\,b$ $\,-5 \,-10\,\,b$ $\,-6 \,-10\,b$

$\,4\,a\;(\,7\,a+\,b) = $   ?

$\,28\,\,a^2 +\,4\,\,a\,b$ $\,11\,\,a^2 +\,5\,\,a\,b$ $\,28\,\,a^2 +\,b$ $\,-28\,\,a^2 +\,5\,\,a\,b$ $\,28\,\,a^2 \,-4\,b$ $\,28\,a +\,4\,\,a\,b$

$\,2\,t\;(\,9\,t\,-2) = $   ?

$\,18\,\,t^2 +\,4$ $\,11\,\,t^2 $ $\,-18\,\,t^2 $ $\,18\,\,t^2 \,-4\,\,t$ $\,18\,\,t^2 \,-2$ $\,18\,\,t^2 \,-4$

$(\,1+\,5\,y)\;(\,-6+\,y) = $   ?

$\,5\,\,y^2 \,-29\,\,y +\,6$ $\,-5\,\,y^2 \,-29\,\,y \,-6$ $\,5\,\,y^2 \,-31\,\,y +\,6$ $\,5\,\,y^2 \,-29\,\,y \,-6$

$(\,2\,-\,a)\;(\,-6\,b\,-5) = $   ?

$\,-12\,\,b +\,10 +\,6\,\,a\,b +\,5\,\,a$ $\,-12\,\,b \,-10 \,-6\,\,a\,b +\,5\,\,a$ $\,-12\,\,b \,-10 +\,6\,\,a\,b +\,5\,\,a$ $\,12\,\,b +\,10 +\,6\,\,a\,b +\,5\,\,a$

$(\,1\,-5\,b)\;(\,-\,b+\,1) = $   ?

$\,5\,\,b^2 \,-6\,\,b +\,1$ $\,5\,\,b^2 +\,6\,\,b +\,1$ $\,-5\,\,b^2 \,-6\,\,b +\,1$ $\,-5\,\,b^2 \,-4\,\,b +\,1$

$(-1+12x)(-1-12x) = $   ?

$1 \,- 144\,x^2$ $1\, +24\,x\,+ 144\,x^2$ $1 \,+ 144\,x^2$ $1\, -24\,x\,+ 144\,x^2$

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

$\,a\;(\,9\;+\,a)$ $\,a\;(\,9\,a\;+\,1)$ $\,a\;(\,9\,^{2}\;+\,1)$ $\,a\;(\,9\,a\;+\,\,a)$

Quelle est l'expression factorisée de $\,-18\,\,b\;+\,48$ ?

$\,6\;(\,-3\,b\;+\,8)$ $\,6\;(\,3\,b\;\,-8)$ $\,6\;(\,-3\;+\,48\,b)$ $\,6\,b\;(\,-3\,b\;+\,8)$

Factoriser l'expression :

$(\,9\,x \,-8)(\,y \,-4)+(\,-2\,y \,-7)(\,9\,x \,-8)$

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