Wednesday

July 23, 2014

July 23, 2014

Posted by **Anonymous** on Monday, April 1, 2013 at 5:09pm.

3√z+1=-3

How do I do this problem? Thanks for your help.

- college algebra -
**Steve**, Monday, April 1, 2013 at 5:34pm3√z+1 = -3

3√z = -4

Now, √z is interpreted to be positive

√4 = 2, not ±2

so, there is no solution to the equation

3√z = -4

since √z is positive

However, we can go on to say that

3√z = -4

9z = 16

z = 16/9

But, this is really a spurious solution, since

3√(16/9)+1 = 3(4/3)+1 = 4+1 = 5

We cannot use -4/3 as √(16/9) unless specifically indicated.

**Related Questions**

college algebra - Please show me the steps to solving this equation:-) √5(...

Math - Find an equation of the line that bisects the obtuse angles formed by the...

maths - I will be thankfull to you if you help me to solve the below problem: 6...

college algebra - I need to figure out how to solve this equation your help will...

Algebra - How would i complete these problems? 1. (√6mn)^5 2. ^3√16x...

Algebra 2 - Use the distance formula to find the equation of a parabola. Focus...

Algebra Work Check - 1. 5√6 * 1/6√216 5/6 * √1296 5/6 * √...

Algebra 2: Radicals URGENT!! - Could some kind, saintly soul help me solve this ...

Algebra 1 - Simplifying Radicals, Use the quotient property to simplify the ...

Axia College - Need help with solving the double equation problem. 3x + 2y = 3 ...