Respuesta :

[tex]\bf x^2-\underline{b} x+b\implies \stackrel{given}{(x-2)}~(x-y)\impliedby \textit{now let's do some FOIL}\\\\ -------------------------------\\\\ \begin{cases} -yx-2x=-\underline{b}x\implies y+2=\underline{b}\\ (-2)(-y)=b\implies 2y=b \end{cases} \\\\\\ \underline{b}=b\implies y+2=2y\implies 2=y[/tex]

what is b?   from the first equation in the system, y + 2 = b.

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