Question

1/3x^2-5=7 what is x

Answer 1

x= 6

Explanation:

`(1)/(3)x^(2)-5=7\\`

Add 5 to both sides

`(1)/(3)x^(2)-5+5=7+5\\\\(1)/(3)x^(2)=12\\`

Multiply both sides by 3

`3*(1)/(3)x^(2)=12*3\\\\x^(2)=36\\`

x² = 6*6

Take square root,

√x² =√6*6

x = 6