Toán 7² . 5 – ( 2 . |x| + 3^0 ) = 630 : 3^2 . 1^10 04/12/2021 By Eloise 7² . 5 – ( 2 . |x| + 3^0 ) = 630 : 3^2 . 1^10
Tìm `x` ? `7^2 . 5 – (2.|x|+3^0)=630 : 3^2 . 1^10` `=>49 . 5 – (2 .|x| + 1 ) = 630 : 9 . 1` `=>245 – 2|x|-1=70` `=>2|x|=174` `=>|x|=87` `=>x=±87` Trả lời
`\text{~~Holi~~}` `7^2 . 5-(2|x|+3^0)=630:3^2 . 1^{10}` `-> 245-2|x|-1=630/3^2` `-> 244-2|x|=70` `-> -2|x|=174` `-> |x|=87` `->` \(\left[ \begin{array}{l}x=87\\x=-87\end{array} \right.\) Trả lời
Tìm `x` ?
`7^2 . 5 – (2.|x|+3^0)=630 : 3^2 . 1^10`
`=>49 . 5 – (2 .|x| + 1 ) = 630 : 9 . 1`
`=>245 – 2|x|-1=70`
`=>2|x|=174`
`=>|x|=87`
`=>x=±87`
`\text{~~Holi~~}`
`7^2 . 5-(2|x|+3^0)=630:3^2 . 1^{10}`
`-> 245-2|x|-1=630/3^2`
`-> 244-2|x|=70`
`-> -2|x|=174`
`-> |x|=87`
`->` \(\left[ \begin{array}{l}x=87\\x=-87\end{array} \right.\)