$\,-6\;(\,9\,y\,-1) = $   ?

$\,-54\,\,y +\,6$ $\,54\,\,y \,-7$ $\,3\,\,y \,-7$ $\,-54\,\,y \,-6$ $\,-54\,\,y \,-1$ $\,-54\,\,y +\,1$

$\,-3\,x\;(\,-2+\,6\,y) = $   ?

$\,6\,\,x \,-18\,y$ $\,-5\,\,x +\,3\,\,x\,y$ $\,6\,\,x +\,6\,y$ $\,6\,\,x \,-18\,\,x\,y$ $\,-6 \,-3\,\,x\,y$ $\,6\,\,x +\,18\,y$

$\,4\,b\;(\,9\,b+\,a) = $   ?

$\,13\,\,b^2 +\,5\,\,a\,b$ $\,36\,b +\,4\,\,a\,b$ $\,36\,\,b^2 +\,a$ $\,36\,\,b^2 +\,4\,\,a\,b$ $\,-36\,\,b^2 +\,5\,\,a\,b$ $\,36\,\,b^2 \,-4\,a$

$\,2\,y\;(\,2\,y\,-\,x) = $   ?

$\,4\,\,y^2 \,-\,x$ $\,4\,\,y^2 +\,x$ $\,-4\,y \,-2\,\,x\,y$ $\,4\,\,y^2 +\,2\,x$ $\,4\,\,y^2 \,-2\,\,x\,y$ $\,4\,\,y^2 +\,\,x\,y$

$(\,1\,-3\,x)\;(\,2\,x+\,6) = $   ?

$\,6\,\,x^2 +\,20\,\,x +\,6$ $\,-6\,\,x^2 \,-16\,\,x +\,6$ $\,-6\,\,x^2 \,-16\,\,x \,-6$ $\,-6\,\,x^2 \,-20\,\,x +\,6$

$(\,6\,-4\,x)\;(\,-4\,-\,y) = $   ?

$\,-24 \,-6\,\,y +\,16\,\,x +\,4\,\,x\,y$ $\,-24 +\,6\,\,y \,-16\,\,x +\,4\,\,x\,y$ $\,-24 \,-6\,\,y \,-16\,\,x +\,4\,\,x\,y$ $\,-24 +\,6\,\,y +\,16\,\,x \,-4\,\,x\,y$

$(\,2\,y\,-3)\;(\,y\,-6) = $   ?

$\,2\,\,y^2 \,-9\,\,y +\,18$ $\,2\,\,y^2 \,-15\,\,y +\,18$ $\,-2\,\,y^2 +\,9\,\,y +\,18$ $\,2\,\,y^2 \,-15\,\,y \,-18$

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

$\,x\;(\,5\,^{2}\;+\,1)$ $\,x\;(\,5\,x\;+\,\,x)$ $\,x\;(\,5\,x\;+\,1)$ $\,x\;(\,5\;+\,x)$

Quelle est l'expression factorisée de $\,-32\;+\,28\,\,y$ ?

$\,4\;(\,-8\;+\,7\,y)$ $\,4\;(\,-8\;+\,28\,y)$ $\,4\;(\,-8\;+\,y)$ $\,4\,y\;(\,-8\;+\,7\,y)$

Quelle est l'expression factorisée de $\,35\,\,x^2\;\,-5\,\,x\,y$ ?

$\,5\,x\;(\,7\,x\;\,-\,y)$ $\,5\,x\;(\,7\,x\;+\,y)$ $\,5\,x\;(\,7\,^{2}\;\,-\,y)$ $\,5\,\,x^2\;(\,7\;\,-\,y)$