Question

18+2.x=10
( x-4) mũ 2 -1=24

Answer 1

a: =>2x=-8

=>x=-4

b:=>(x-4)^2=25

=>x-4=5 hoặc x-4=-5

=>x=-1 hoặc x=9

Answer 2

18 + 2.x = 10

        2.x = 18 - 10

        2.x  = 8

          x    = 8 : 2

          x = 4

( x-4)² - 1 = 24

( x- 4)²    = 24 + 1

( x-4)²      = 25

(x-4)²      = 5²

\(\left[{}\begin{matrix}x-4=5\\x-4=-5\end{matrix}\right.\)

\(\left[{}\begin{matrix}x=5+4\\x=-5+4\end{matrix}\right.\)

\(\left[{}\begin{matrix}x=9\\x=-1\end{matrix}\right.\)