SOLUTION: {{{ (2r-5)^2=81 }}}
Algebra.Com
Question 668176:
Found 2 solutions by ReadingBoosters, MathTherapy:
Answer by ReadingBoosters(3246) (Show Source): You can put this solution on YOUR website!
Starting with
...
(2r-5)(2r-5) = 81
...
...
(4r+8)(r-7) = 0
4r+8 = 0, so r =
r-7 = 0, so r =
...
Solutions
-2 and 7
............
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Answer by MathTherapy(10551) (Show Source): You can put this solution on YOUR website!
----- Taking square root of both sides
2r - 5 = 9_____2r = 14______r = , or
2r - 5 = - 9_____2r = - 4______r = , or
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