Math Help - Problem on Limits

1. Problem on Limits

Can anyone give guidance and point me in the right direction for this problem? I've tried a couple approaches that have lead to dead ends and am not sure what to do. Thanks.

(SqRT(10x+9)-SqRT(79))/x-7

Limit x->7

2. Originally Posted by JP22
Can anyone give guidance and point me in the right direction for this problem? I've tried a couple approaches that have lead to dead ends and am not sure what to do. Thanks.

(SqRT(10x+9)-SqRT(79))/x-7

Limit x->7
start by multiplying the numerator and denominator by $\sqrt{10x+9} + \sqrt{79}$

3. I think I figured it out. Thanks.