Question

pls help. will medal and fan.

Answer 1

It is asking you to simplify the expression. In order to get the common denominator, you must multiply the first term by x/x, and the second by (x-7)/(x-7).
Does that make sense?

Answer 2

Wait so how do you multiply? Sorry if thats a dumb question

Answer 3

i mean i know how to multiply, but what do you multiply

Answer 4

\[\left( \frac{4x}{x-7}\times \frac {x}{x} \right)-\left( \frac{x+7}{x}\times \frac{x-7}{x-7}\right)\]

Answer 5

so it would be (4x^2/x^2-7)

Answer 6

how do you do the second one

Answer 7

on the top

Answer 8

So you will end up with: \[\frac{4x^2-(x+7)(x-7)}{x(x-7)} \rightarrow \frac{4x^2-x^2+49}{x(x-7)} \rightarrow \frac{3x^2+49}{x(x-7)}\]

Answer 9

ok so I was completely wrong haha

Answer 10

Do you understand what I did?
And you were right; you just forgot the x in 7x. I didn't distribute b/c your answer choices didn't.