Posted by AwesomeGuy on .
Find the inverse of the following quadratic equation. Hint: Complete the square first.
y= 2x²+16x5

PreCalculus 
Reiny,
y = 2(x^2 + 8x +1616)  5
= 2( (x+4)^2  16)  5
y = 2(x+4)^2  37
then the inverse is
x = 2(y+4)^2  37 
PreCalculus 
Steve,
so, does f(f^{1}(x)) = x?

PreCalculus 
Ange,
can someone please help me A
16
ft
ladder leans against the side of a house. The bottom of the ladder is
9
ft
away from the side of the house. Find
x
, the angle of elevation of the ladder. Round your answer to the nearest tenth of a degree.
x
169