Question

(4x - 1) \(^2\)=25 . 9

mn giúp mik với

 

Answer 1

`(4x-1)^2 = 25*9`

`<=> (4x-1)^2 = 225`

`<=> [(4x-1=15),(4x-1=-15):}`

`<=> [(4x=15+1=16),(4x=-15+1=-14):}`

`<=> [(x=16/4 = 4),(x = -14/4 =-7/2):}`

Vậy `S={4;-7/2}`

Answer 2

\(\left(4x-1\right)^2=225\\ =>\left(4x-1\right)^2=15^2\\ =>4x-1=15\\ =>4x=16\\ =>x=4\)

Answer 3

(4x−1)2=225=>(4x−1)2=152=>4x−1=15=>4x=16=>x=4