thack1xJune7
thack1xJune7
07-04-2016
Mathematics
contestada
What is the inverse of x=4-4y+y^2
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apologiabiology
apologiabiology
07-04-2016
to find invers
1. solve for y
2. replace y with xinverse
so
x=4-4y+y^2
reorder right side
x=y^2-4y+4
factor right side
x=(y-2)^2
squaer root both sides
+/-√x=y-2
add 2 to both sides
2+/-√x=y
switch x and y
2+/-√y=xinverse
xinverse=2+√y or 2-√y
subtract 4 from both sides
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