中二數題=====1/4-1/2^2 x=0

1/4 - 1/2^2x = 0 ---> (將1/4變成 (1/2)^2 , 再將1/2^2x 變成(1/2)^2x )

(1/2)^2 - (1/2)^2x = 0 ---> (大家都有 (1/2 ) , 所以可以抽數 )

(1/2) ^ (2-2x) = 0 (抽個commom factor 出黎 , 底數相同 , 指數數相減)

2 - 2x = 0 (任何數既 0 次方都係等於 0, 所有 (1/2)^0 = 0 , 所以2 - 2x = 0 )

x = 1



hope that can help u

1/4 - 1/2^2 x = 0
1/4 - 1/4 x = 0
1/4 = 1/4 x
0.25 = 0.25 x (for easier calculation, I changed them into decimal numbers)
0.25/0.25 = 0.25 x/0.25
x = 1