Which is the first step you should do when solving the equation below? 3x² - 4 = 71
1) Take the square root of both sides: √(3x² - 4) = √71
2) Divide both sides by 3: 3x² - 4 = 71/3
3) Add 4 to both sides: 3x² - 4 + 4 = 71 + 4
4) Subtract 71 from both sides: 3x² - 4 - 71 = -71