Question

3x^2-4=8 ....... Solve the following equation by taking square roots! PLZ SHOW WORK ASAP TY!

Answer 1

`x=\± 2`

Explanation:

`3x^2-4=8`

`3x^2-4+4=8+4`

`3x^2=12`

`\displaystyle (3x^2)/(3)=(12)/(3)`

`x^2=4`

`x=\± √(4)`

`x=\± 2`

Answer 2

x = ±2

Explanation:

3x^2-4=8

Add 4 to each side

3x^2-4+4=8+4

3x^2 = 12

Divide by 3

3x^2 /3 = 12/3

x^2 = 4

Take the square root of each side

sqrt(x^2) = ±sqrt(4)

x = ±2