Question

16-9x^2=0

Answer 1

\(\Leftrightarrow\left(4-3x\right)\left(4+3x\right)=0\)

=>x=4/3 hoặc x=-4/3

Answer 2

`16-9x^2 = 0`

`9x^2=16`

`x^2=16 : 9`

`x^2 =16/9`

`=>` \(x=\sqrt{\dfrac{16}{9}}\)

`x=4/3` hoặc `x=-4/3`

Vậy `S = {4/3; -4/3}`

Answer 3

9x² = 16

x² = 16/9

x² = (4/3)²

x = \(\pm\) 4/3

=> x ∈ {4/3 ; -4/3}