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December 19, 2014

December 19, 2014

Posted by **Shawn** on Sunday, November 30, 2008 at 9:39pm.

3.) f(x)= 2x-5 for this one I have

y= (x+5)/2 is this correct?

4.) g(x)= (x+5)^3

I am stuck on this one.

- Algebra inverse -
**Reiny**, Sunday, November 30, 2008 at 9:45pm3 is good

4:

let y = (x+5)^2

interchange x with y

x = (y+5)^2

+-sqrt(x) = y+5

y = -5 +-sqrt(x) or f(x) = -5 +-sqrt(x)

- Algebra inverse question -
**Shawn**, Sunday, November 30, 2008 at 9:51pmHi Reiny,

I just have one question for 4.) the problem is g(x)= (x+5)^3

how were you able to convert the equation to the following?

let y = (x+5)^2

interchange x with y

x = (y+5)^2

- Algebra inverse question -
**Reiny**, Monday, December 1, 2008 at 12:34ammy error, did not read the question carefully enough, thought it was squared instead of cubed.

so just change the sqrt to cube root and use only the positive sign.

so last line should be

y = -5 +-cuberoot(x)

- Algebra inverse question -

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