giải giúp mik cái nha. a)(5-x3)(x-4)=0 Question giải giúp mik cái nha. a)(5-x3)(x-4)=0 in progress 0 Môn Toán Nem 5 years 2020-11-27T06:31:19+00:00 2020-11-27T06:31:19+00:00 2 Answers 75 views 0
Answers ( )
Đáp án: `x ∈ { 5/3 ; 4 }`
Giải thích các bước giải:
`(5 – x . 3)(x – 4) = 0`
`⇒` \(\left[ \begin{array}{l}5 – x . 3 = 0\\x – 4 = 0\end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}x . 3 = 5\\x = 0 + 4 = 4\end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}x = 5 : 3 = \frac{5}{3}\\x = 4\end{array} \right.\)
Vậy `x ∈ { 5/3 ; 4 }`
`(5 – x . 3)(x – 4) = 0`
`=> `\(\left[ \begin{array}{l}5 – x . 3 = 0\\x – 4 = 0\end{array} \right.\)
`<=>`\(\left[ \begin{array}{l}x . 3 = 5\\x = 0 + 4\end{array} \right.\)
`<=>`\(\left[ \begin{array}{l}x = $\frac{5}{3}$\\x = 4\end{array} \right.\)
`=> x ∈ {5/3 ; 4}.`