Jasmin C.

asked • 10/05/15

I don't understand :/ ?

So the problem I have is (x-4)2/3=100. I used the "help me solve this" feature and it gave me:
 
((x-4)2/3)3/2=+-(100)3/2
 
and that gave me:
 
x-4=+-1000
 
 
I know how you got x-4 by multiplying by the reciprocal and it cancels them out but how do you get 1000 from (100)3/2 ?
 
another question gave me:
 
((x-1)2/3)3/2 =+-(81)3/2
 
and it equaled:
 
x-1=729 
 
I just don't understand what you have to do to solve the right side of the equation.
 

Aman A.

tutor
(100)3/2=(1001/2)3=(√100)3=(10)3=1000
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10/05/15

5 Answers By Expert Tutors

By:

Wachaspati P. answered • 10/05/15

Tutor
5.0 (228)

SAT Math . ACT Math . Algebra (All) . Geometry . Trig . Pre-Calculus

Lena S. answered • 10/05/15

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4.8 (85)

Violin and Piano Teacher

Art V.

tutor
It's x =-996 not -9996th.
Report

10/05/15

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