a) ( x^2 + 54) – 32 = 122
b) ( x-3) ^3 = 5^8 : 5^5
các bn giải gấp giúp mk . thanks
a) ( x^2 + 54) – 32 = 122 b) ( x-3) ^3 = 5^8 : 5^5 các bn giải gấp giúp mk . thanks
By Gianna
By Gianna
a) ( x^2 + 54) – 32 = 122
b) ( x-3) ^3 = 5^8 : 5^5
các bn giải gấp giúp mk . thanks
a)` (x^2+54)-32=122`
`⇒x^2+54-32=122`
`⇒x^2+22=122`
`⇒x^2=100`
`⇒`\(\left[ \begin{array}{l}x=10\\x=-10\end{array} \right.\)
b)`(x-3)^3=5^8÷5^5`
`⇒(x-3)^3=5^3`
`⇒ x-3=5`
`⇒x=8`
a) ( x2 + 54) – 32 = 122
x2 + 54 = 122 + 32
x2 + 54 = 154
x2 = 154 – 54
x2 = 100
x2 = 102
=> x = 10
a) ( x – 3)3 = 58 : 55
( x – 3)3 = 53
( x – 3)3 = 5
x = 5 + 3
x = 8