$\,-6\;(\,5\,y\,-4) = $   ?

$\,-30\,\,y \,-24$ $\,-30\,\,y +\,4$ $\,-30\,\,y \,-10$ $\,-30\,\,y \,-4$ $\,-\,\,y \,-10$ $\,-30\,\,y +\,24$

$\,2\,a\;(\,-4\,a+\,5\,b) = $   ?

$\,-8\,\,a^2 +\,5\,b$ $\,-8\,\,a^2 \,-10\,b$ $\,-2\,\,a^2 +\,7\,\,a\,b$ $\,-8\,\,a^2 +\,7\,\,a\,b$ $\,8\,\,a^2 +\,10\,b$ $\,-8\,\,a^2 +\,10\,\,a\,b$

$\,5\,t\;(\,-6+\,2\,t) = $   ?

$\,-30\,\,t \,-10\,t$ $\,-30\,\,t +\,2\,t$ $\,30 +\,10\,\,t^2$ $\,-\,\,t +\,7\,\,t^2$ $\,-30\,\,t +\,7\,\,t^2$ $\,-30\,\,t +\,10\,\,t^2$

$(\,1\,-\,a)\;(\,3+\,6\,a) = $   ?

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

$(\,t\,-5)\;(\,-5\,-4\,x) = $   ?

$\,-5\,\,t \,-4\,\,t\,x +\,25 +\,20\,\,x$ $\,-5\,\,t +\,4\,\,t\,x \,-25 +\,20\,\,x$ $\,5\,\,t \,-4\,\,t\,x \,-25 +\,20\,\,x$ $\,-5\,\,t \,-4\,\,t\,x \,-25 \,-20\,\,x$

$(\,6\,a\,-2)\;(\,-5+\,a) = $   ?

$\,6\,\,a^2 +\,32\,\,a +\,10$ $\,-6\,\,a^2 +\,28\,\,a +\,10$ $\,6\,\,a^2 +\,28\,\,a +\,10$ $\,6\,\,a^2 \,-32\,\,a +\,10$

$(-10x+7y)(-10x-7y) = $   ?

$100x \,- 49\,y^2$ $100\,x^2 \,- 7\,y^2$ $100\,x^2\, -140\,x\,y\,+ 49\,y^2$ $100\,x^2 \,- 49\,y^2$

Quelle est l'expression factorisée de $\,2\,\,x^2\;+\,3\,\,x$ ?

$\,x\;(\,2\,x\;+\,3)$ $\,x\;(\,2\,^{2}\;+\,3)$ $\,x\;(\,2\,x\;+\,3\,\,x)$ $\,x\;(\,2\,x\;+\,2)$

Quelle est l'expression factorisée de $\,-56\,\,t\;+\,72$ ?

$\,8\;(\,7\,t\;\,-9)$ $\,8\;(\,-7\,t\;+\,9)$ $\,8\;(\,-7\;+\,72\,t)$ $\,8\;(\,7\,t\;+\,9)$

Factoriser l'expression :

$(\,5\,x \,-7)(\,6\,y +\,3)+(\,-7\,y +\,6)(\,5\,x \,-7)$

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