Question 295915
(9/8)-2=5/(x^2)
(-7/8)=5(x^2) Cross muliply 
7x^2=-40 Divide both sides by 7
x^2=(-40/7)find the sqrt of both sides
x= i*sqrt(40/7)

Unless you ment to write the problem as 9/(8-2)=5/(x^2) and then you will have a different answer, but the same basic steps.