+0  
 
0
285
4
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150=(1+x)^4

 

Forgot how to solve this.  Been years since advanced algebra.

Guest May 18, 2017
 #1
avatar
0

This isn’t advanced algebra. It’s basic algebra.

Guest May 18, 2017
 #2
avatar+17744 
0

150  =  (1 + x)4

Take the fourth root of both sides; the fourth root of 150 is approximately 3.4996.

3.4996  =  1 + x

Subtract 1     --->     x  =  2.4996     (approximately)

geno3141  May 18, 2017
 #3
avatar
0

It’s not that basic, Geno. There are two solutions.

Guest May 18, 2017
 #4
avatar+87301 
+1

 

150   = ( 1 + x) ^4         take the  positive/negative 4th root

 

± (150)^(1/4)  =  1 + x    subtract 1 from both sides

 

± (150)^(1/4) -  1   =  x

 

The two (real)  answers  are

 

x = (150)^(1/4) -  1  ≈ 2.499

 

Or

 

x  = - (150)^(1/4) -  1  ≈  -4.499

 

 

 

cool cool cool

CPhill  May 18, 2017
edited by CPhill  May 18, 2017

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