Question

Please help 20 POINTS. Problem below

Answer 1

f(x):  y = 9x² - 12

f⁻¹(x):  x = 9y² - 12

    x + 12 = 9y²

     $\frac{x+12}{9} = y^{2}$  

     $\sqrt{\frac{x+12}{9}} = |y|$     ; x ≥ -12

     $+/-\sqrt{\frac{x+12}{9}} = y$

Answer: C