Question 591022: Please help me and show work
Find all real solution
1. square rootx+8 + squarerootx-9 =17
2.x^2/7=2 Found 2 solutions by Alan3354, stanbon:Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! Find all real solution
1. square rootx+8 + squarerootx-9 =17
Square both sides
x-9 = 64
x = 73
--------------
2.x^2/7=2
x^2 = 14
x = sqrt(14)
x = -sqrt(14)
You can put this solution on YOUR website! Find all real solution
1. sqrt(x+8) + sqrt(x-9) = 17
----
Square both sides:
(x+8) + 2*sqrt(x^2-x-72) + x-9 = 289
-----------------------------------
2x-1 + 2*sqrt(x^2-x-72) = 289
-----
2sqrt(x^2-x-72) = 290-2x
------
sqrt(x^2-x-72) = 145 - x
----
Square both sides again:
x^2-x-72 = 21025 - 290x + x^2
289x = 21097
x = 73
==============
Cheers,
Stan H.
(