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# 150=(1+x)^4

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150=(1+x)^4

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

Guest May 18, 2017
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#1
0

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

Guest May 18, 2017
#2
+17446
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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
0

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

Guest May 18, 2017
#4
+73854
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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

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

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