Posted by **AwesomeGuy** on Thursday, March 7, 2013 at 12:50am.

Find the inverse of the following quadratic equation. Hint: Complete the square first.

y= 2x²+16x-5

- Pre-Calculus -
**Reiny**, Thursday, March 7, 2013 at 10:52am
y = 2(x^2 + 8x +16-16) - 5

= 2( (x+4)^2 - 16) - 5

y = 2(x+4)^2 - 37

then the inverse is

x = 2(y+4)^2 - 37

- Pre-Calculus -
**Steve**, Thursday, March 7, 2013 at 11:26am
so, does f(f^{-1}(x)) = x?

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