Elitmus Exam Numerical Ability Algebra

how many values of x for-

(2x+9)^2/(x+3)

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Elitmus Other Question

In a gp sum of all succeeding terms of gp is 5/6th of preceding, find r?
Show the method also.
Number of values of x for -

(2x+9)^2/(x+3)

gives an integral value.