i dont know where to go from here, i tried dividing by 4 and mult. the left by itself, and get lost, the answer is 7

Printable View

- August 12th 2011, 08:20 PMmathmathmathmathmathmathmequation w. radicals and exponenets

i dont know where to go from here, i tried dividing by 4 and mult. the left by itself, and get lost, the answer is 7 - August 12th 2011, 09:33 PMProve ItRe: equation w. radicals and exponenets
- August 13th 2011, 04:52 AMHallsofIvyRe: equation w. radicals and exponenets
You should of course, check the solution. (Squaring both sides of an equation may introduce "extraneous" solutions.)

4- 2= 2 so the solution checks. - August 13th 2011, 07:09 AMmathmathmathmathmathmathmRe: equation w. radicals and exponenets
thanks so much prove it, but can you explain when you get the (x-7) squared, how do you elimate the second (x-7) in the last step? does it cancel itself out? dont understand that step, thanks again

- August 13th 2011, 07:18 AMProve ItRe: equation w. radicals and exponenets