Question

Which equation is the inverse of Y equals 9X Square -4

Answer 1

`y = 9x {}^(2) - 4 \\ flip \: x \: and \: y \\ x =9 (y ) {}^(2) - 4 \\ solve \: for \: the \: inverse \: of \: y \\ x + 4 = 9(y ) {}^(2) \\ y {} {}^(2) = (x + 4)/(9) \\ you \: can \: split \: it \: into \: two`

`y {}^((1)) = \sqrt{ (x + 4)/(9) } \\ y {}^((2)) = - \sqrt{ (x + 4)/(9) }`