$\,-3\;(\,-4\,-4\,t) = $   ?

$\,12 +\,12\,\,t$ $\,12 \,-7\,t$ $\,-7 \,-7\,\,t$ $\,12 \,-12\,\,t$ $\,12 \,-4\,t$ $\,12 +\,4\,\,t$

$\,5\,y\;(\,-3\,y+\,2\,x) = $   ?

$\,2\,\,y^2 +\,7\,\,x\,y$ $\,-15\,\,y^2 \,-10\,x$ $\,-15\,\,y^2 +\,7\,\,x\,y$ $\,-15\,\,y^2 +\,10\,\,x\,y$ $\,15\,\,y^2 +\,10\,x$ $\,-15\,\,y^2 +\,2\,x$

$\,5\,b\;(\,-7\,-6\,b) = $   ?

$\,-2\,\,b \,-\,\,b^2$ $\,-35\,\,b \,-\,b$ $\,35\,\,b \,-30\,b$ $\,-35\,\,b \,-6\,b$ $\,-35\,\,b +\,30\,b$ $\,-35\,\,b \,-30\,\,b^2$

$(\,3\,-6\,a)\;(\,a+\,4) = $   ?

$\,-6\,\,a^2 +\,21\,\,a +\,12$ $\,-6\,\,a^2 \,-21\,\,a +\,12$ $\,-6\,\,a^2 \,-21\,\,a \,-12$ $\,6\,\,a^2 \,-21\,\,a \,-12$

$(\,5\,a\,-1)\;(\,-3\,-5\,b) = $   ?

$\,-15\,\,a \,-25\,\,a\,b +\,3 +\,5\,\,b$ $\,15\,\,a \,-25\,\,a\,b +\,3 \,-5\,\,b$ $\,-15\,\,a +\,25\,\,a\,b +\,3 +\,5\,\,b$ $\,15\,\,a \,-25\,\,a\,b +\,3 +\,5\,\,b$

$(\,5\,-\,y)\;(\,4\,-5\,y) = $   ?

$\,-5\,\,y^2 \,-29\,\,y +\,20$ $\,5\,\,y^2 \,-29\,\,y +\,20$ $\,-5\,\,y^2 \,-21\,\,y +\,20$ $\,5\,\,y^2 \,-29\,\,y \,-20$

$(2x+12y)(2x-12y) = $   ?

$4\,x^2 \,- 144y$ $4\,x^2 \,- 12\,y^2$ $4\,x^2 \,- 144\,y^2$ $2x \,- 12y$

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

$\,b\;(\,1\;+\,5\,b)$ $\,b\;(\,b\;+\,4)$ $\,b\;(\,b\;+\,5\,\,b)$ $\,b\;(\,b\;+\,5)$

Quelle est l'expression factorisée de $\,10\,\,t\;\,-5$ ?

$\,5\;(\,2\,t\;+\,1)$ $\,5\;(\,2\,t\;\,-5)$ $\,5\,t\;(\,2\,t\;\,-1)$ $\,5\;(\,2\,t\;\,-1)$

Factoriser l'expression :

$(\,4\,x +\,1)(\,8\,y +\,4)+(\,y \,-5)(\,4\,x +\,1)$

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