150=(1+x)^4

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

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

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)

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

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