plzzzz help

z[8.01, 8.07, 10.01]Which of the following represents x squared minus sixteen all over x squared minus four x in simplified form?

Question

plzzzz help


z[8.01, 8.07, 10.01]Which of the following represents x squared minus sixteen all over x squared minus four x in simplified form?

bibby · Answer

$a^2-b^2=(a-b)*(a+b)\\huge \frac{x^2-16}{x^2-4}$ 
theyre both in that form

bibby · Answer

hmm?

bibby · Answer

the question marks disappear if you refresh but idk what you were doing

bibby · Answer

anyhow my point was, we can rewrite $\huge \frac{x^2-16}{x^2-4}$ in $a^2-b^2$ form
let's start with $x^2-16$

anonymous · Answer

$$\frac{ x^2{-16} }{ x^{2}-4x}$$

anonymous · Answer

thats how it looks

bibby · Answer

oh whatever, no big deal

bibby · Answer

$x^2-16=(x)^2-(?)^2$

what goes in t he question mark?

anonymous · Answer

4?

bibby · Answer

exactly. so  now we have $a^2-b^2=(a-b)*(a+b)$ and $(x^2-4^2)$

factorize the numerator

anonymous · Answer

hu?

bibby · Answer

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