whats the LCD for
b 2b
-- --
(b+5) (b-5)
and
1 3
-- --
2xy x^2
and
1 5
-- --
12a^2b 18b^2
and
6 4x
-- --
x-3 (x-3)^2
there all two fractions by the way i have no idea what the sign is for fractions on the internet
Hello,
you asked for the LCD only: If you can't factor the denominators the LCD is the product of both denominators:
$\displaystyle \frac{b}{b+5},\ \frac{2b}{b-5}\ \underbrace{\longrightarrow}_{denominator} (b+5)(b-5)=b^2-25$
$\displaystyle \frac{1}{2xy},\ \frac{3}{x^2}\ \underbrace{\longrightarrow}_{denominator}2x^2y $
$\displaystyle \frac{1}{12a^2 b},\ \frac{5}{18 b^2}\ \underbrace{\longrightarrow}_{denominator}36a^2 b^2 $
$\displaystyle \frac{6}{x-3},\ \frac{4x}{(x-3)^2}\ \underbrace{\longrightarrow}_{denominator} (x-3)^2$
EB