Question

PLEASE HELP!!!!

Add. Also, identify any x-values for which the following expression is undefined:

(5x)/(4x^2) + (7)/(x+1)

Answer 1

Whatever evaluate the denominator (bottom) to zero is where the expression is undefined... so 4x^2 tells us that x = 0 is a restriction and (x+1) has x = -1 as a restriction.

To add you need a common denominator.

[ 5x(x+1) + 7(4x^2) ] / [ 4x^2 (x+1) ]

simplify from here.

Answer 2

Okay, it's: (5x^2+5x+28x^2)/4x^2(x+1) This simplifies further to: (33x^2+5x)/4x^2(x+1)

Answer 3

Now, can you tell me if the top can factor any more and if it can cancel with the denominator?

Answer 4

Yes... factor an x out of the top and cancel with one x in the denominator. Then that looks like about it.

Answer 5

Okay, thanks! Let me try that . . . .

Answer 6

Okay, it turns out to be: (33x+5)/(4x^2+4x) Does that seem to be correct?

Answer 7

Yes... here is a link: http://www.wolframalpha.com/input/?i=%285x%29%2F%284x%5E2%29+++%2B+++%287%29%2F%28x%2B1%29

Answer 8

Thanks!

Answer 9

Wow!!!! That's an ABSOLUTELY AMAZING website!!! I've always been searching for something like that! Thanks a million!

Answer 10

Be careful... you still need to be able to work them out by hand. Just check your answers there.

Answer 11

Yes, I never like to cheat. Thanks for the advice. You have a steep price to pay (not to mention, confusion) for cheating. I'll definitely only use this for checking answers. :)