3x^2-12x =
x^2-16
=3x*(x-4)
(x-4)*(x+4)
3x
x+4
2)
a^2-4 =
4a^2-8a
=(a-2)*(a+2)=
4a*(a-2)
= (a+2)
4a
\frac{3x^2-12x}{x^2-16} \frac{3x(x-4)}{(x-4)(x+4)}
x≠4
\frac{3x}{(x+4)}
\frac{a^2-4}{4a^2-8a}\frac{(a-2)(a+2)}{4a(a-2)}
x≠2
\frac{(a+2)}{4a}
3x^2-12x =
x^2-16
=3x*(x-4)
(x-4)*(x+4)
3x
x+4
2)
a^2-4 =
4a^2-8a
=(a-2)*(a+2)=
4a*(a-2)
= (a+2)
4a
\frac{3x^2-12x}{x^2-16} \frac{3x(x-4)}{(x-4)(x+4)}
x≠4
\frac{3x}{(x+4)}
\frac{a^2-4}{4a^2-8a}\frac{(a-2)(a+2)}{4a(a-2)}
x≠2
\frac{(a+2)}{4a}