$\,-4\;(\,-6\,b\,-3) = $   ?

$\,24\,\,b \,-12$ $\,24\,\,b \,-7$ $\,24\,\,b +\,12$ $\,24\,\,b +\,3$ $\,24\,\,b \,-3$ $\,-10\,\,b \,-7$

$\,3\,b\;(\,-4\,b+\,3\,a) = $   ?

$\,-12\,\,b^2 +\,9\,\,a\,b$ $\,-12\,\,b^2 \,-9\,a$ $\,-12\,\,b^2 +\,3\,a$ $\,-12\,b +\,9\,\,a\,b$ $\,-\,\,b^2 +\,6\,\,a\,b$ $\,12\,\,b^2 +\,6\,\,a\,b$

$\,3\,t\;(\,-8\,-\,t) = $   ?

$\,-24\,\,t \,-\,t$ $\,-24\,\,t +\,3\,t$ $\,-5\,\,t +\,2\,\,t^2$ $\,-24\,\,t \,-3\,\,t^2$ $\,-24\,\,t +\,2\,t$ $\,24 \,-3\,\,t^2$

$(\,3\,y\,-5)\;(\,y+\,1) = $   ?

$\,3\,\,y^2 \,-2\,\,y +\,5$ $\,3\,\,y^2 \,-8\,\,y +\,5$ $\,-3\,\,y^2 \,-8\,\,y \,-5$ $\,3\,\,y^2 \,-2\,\,y \,-5$

$(\,4\,-6\,t)\;(\,-5\,x\,-4) = $   ?

$\,-20\,\,x \,-16 +\,30\,\,t\,x +\,24\,\,t$ $\,20\,\,x \,-16 \,-30\,\,t\,x +\,24\,\,t$ $\,-20\,\,x \,-16 \,-30\,\,t\,x +\,24\,\,t$ $\,-20\,\,x \,-16 +\,30\,\,t\,x \,-24\,\,t$

$(\,4\,-5\,a)\;(\,2\,-\,a) = $   ?

$\,5\,\,a^2 \,-6\,\,a \,-8$ $\,5\,\,a^2 +\,6\,\,a +\,8$ $\,5\,\,a^2 \,-14\,\,a +\,8$ $\,-5\,\,a^2 \,-14\,\,a \,-8$

$(8y+1)(8y-1) = $   ?

$64\,y^2\, +16\,y\,+ 1$ $64\,y^2 \,- 2$ $64\,y^2\, -16\,y\,+ 1$ $64\,y^2 \,- 1$

Quelle est l'expression factorisée de $\,4\,\,x\;+\,5\,\,x^2$ ?

$\,x\;(\,4\;+\,5\,x)$ $\,x\;(\,4\;+\,5\,\,x^2)$ $\,x\;(\,4\,x\;+\,5)$ $\,x\;(\,4\;+\,x)$

Quelle est l'expression factorisée de $\,20\,\,a\;\,-15$ ?

$\,5\;(\,4\,a\;\,-15)$ $\,5\;(\,-4\,a\;+\,3)$ $\,5\;(\,4\,a\;\,-3)$ $\,5\;(\,4\;\,-15\,a)$

Factoriser l'expression :

$(\,8\,x +\,6)(\,7\,y +\,8)+(\,-8\,y \,-3)(\,8\,x +\,6)$

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