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Algebra/ASAP! College Algerbra 1 word problem


Please help I need this before 11 please!!


Collin, I would be glad to help.  First, you need to multiply both sides by 5 to get (x - 9)^2 = 45.  The next step would be to take the square root of both sides to get rid of the exponent.  This would get (x - 9) =  + or - sqrt(45). Notice the plus or minus, because there are two square roots of a positive number, one positive and one negative since positive times positive = positive and negative times negative = positive.  Now, sqrt(45) can be simplified to 3* sqrt(5) since 45 = 9 * 5 and the square root of nine is 3 ( we already have the plus or minus so we just take positive 3).


X - 9 = + or - 3 sqrt(5).  
Adding 9 to both sides we get the solution

X = 9 + or - 3 sqrt(5)

Good luck in Math :)



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Anne Losch


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