Practice Final Exam

Solve for x: 64r² - 36 = 0  →  (8r - 6)(8r + 6) = 0  →   8r - 6 = 0 or 8r + 6 = 0  →  
8r - 6 = 0  →  8r = 6   →  r = 6/8   →  r = 3/4

     or

8r + 6 = 0  →  8r = -6  →  r = -6/8  →   r = -3/4

So there are two answers: r = 3/4 or r = -3/4  return