Tìm x biết : ( 17x – 5 . 7^2 ) : 23 = ( 23^2 – 8^2 )^2 – 15^2 13/11/2021 Bởi Charlie Tìm x biết : ( 17x – 5 . 7^2 ) : 23 = ( 23^2 – 8^2 )^2 – 15^2
(17x-5.$7^{2}$):23=$($23^{2}$-$8^{2}$)^{2}$-$15^{2}$ ⇔(17x-5.49):23=$(529-64)^{2}$-225 ⇔(17x-245):23=$(465)^{2}$-225 ⇔(17x-245):23=216225-225 ⇔(17x-245):23=216000 ⇔17x-245=216000.23 ⇔17x-245=4968000 ⇔17x=4968000+245 ⇔17x=4968245 ⇔x=$\frac{4968245}{17}$ HỌC TỐT Bình luận
`( 17x – 5 . 7^2 ) : 23 = ( 23^2 – 8^2 )^2 – 15^2` `(17x – 245) : 23 = 216225 – 225` `(17x – 245) : 23 =216000` `(17x – 245) = 4968000` `17x = 4968245` `x = 4968245/17` Bình luận
(17x-5.$7^{2}$):23=$($23^{2}$-$8^{2}$)^{2}$-$15^{2}$
⇔(17x-5.49):23=$(529-64)^{2}$-225
⇔(17x-245):23=$(465)^{2}$-225
⇔(17x-245):23=216225-225
⇔(17x-245):23=216000
⇔17x-245=216000.23
⇔17x-245=4968000
⇔17x=4968000+245
⇔17x=4968245
⇔x=$\frac{4968245}{17}$
HỌC TỐT
`( 17x – 5 . 7^2 ) : 23 = ( 23^2 – 8^2 )^2 – 15^2`
`(17x – 245) : 23 = 216225 – 225`
`(17x – 245) : 23 =216000`
`(17x – 245) = 4968000`
`17x = 4968245`
`x = 4968245/17`