Question

Answer 1

\(a,\Leftrightarrow11x^2-x-11x^2=-17\Leftrightarrow x=17\\ b,\Leftrightarrow\left(x-10\right)\left(x-2\right)=0\Leftrightarrow\left[{}\begin{matrix}x=10\\x=2\end{matrix}\right.\)

Answer 2

a

x(11x-1)-11x²=-17

11x²-x-11x²=-17

x=17

b

x(x-10)-2(x-10)=0

(x-2)(x-10)=0

TH1 x-2=0

       x     =2

TH2 x-10=0

        x      =10

Answer 3

A)\(x\left(11x-1\right)-11x^2=-17\)

\(\Leftrightarrow\)\(11x^2-x-11x^2=-17\)   

\(\Leftrightarrow\)                      \(-x=-17\)

\(\Leftrightarrow\)                            \(x=17\)

  vậy S = {17}

B) \(x\left(x-10\right)-2\left(x-10\right)=0\)

\(\Leftrightarrow\left(x-10\right)\left(x-2\right)=0\)

\(\Rightarrow\left\{{}\begin{matrix}x-10=0\\x-2=0\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}x=10\\x=2\end{matrix}\right.\)

vậy S={10,2}