Giải thích các bước giải :
`a)(8+x)(6-x)=0`
`<=>`\(\left[ \begin{array}{l}8+x=0\\6-x=0\end{array} \right.\)
`<=>`\(\left[ \begin{array}{l}x=-8\\x=6\end{array} \right.\)
Vậy : `x ∈ {-8; 6}`
`b)x^2-5x=0`
`<=>x(x-5)=0`
`<=>`\(\left[ \begin{array}{l}x=0\\x-5=0\end{array} \right.\)
`<=>`\(\left[ \begin{array}{l}x=0\\x=5\end{array} \right.\)
Vậy : `x ∈ {0; 5}`
`c)5.(-4).x=-106`
`<=>-20.x=-106`
`<=>x=(-106)/(-20)`
`<=>x=(53)/(10)`
Vậy : `x=(53)/(10)`
`d)(-1)(-3)(-6).x=36`
`<=>-18.x=36`
`<=>x=(36)/(-18)`
`<=>x=-2`
Vậy : `x=-2`
`e)-152-(3x+1)=(-2)(-77)`
`<=>-152-3x-1=154`
`<=>-3x=154+152+1`
`<=>-3x=307`
`<=>x=(-307)/3`
Vậy : `x=(-307)/3`
`f)x+x+x+82=-2-x`
`<=>x+x+x+x=-2-82`
`<=>4x=-84`
`<=>x=(-84)/4`
`<=>x=-21`
Vậy : `x=-21`
