## Tresag Group Title simplify to the lowest terms 16a^2/4a+11b-121b^2/4a+11b one year ago one year ago

1. gaara438125 Group Title

$\frac{ 16a^2 }{ 4a + 11 } - \frac{ 121b^2 }{ 4a + 11b }$ i'm guessing you meant that?

2. Tresag Group Title

yes

3. gaara438125 Group Title

find an LCD which in this case is?

4. Tresag Group Title

i don't know...nothing goes into 121

5. gaara438125 Group Title

the LCD is least common denominator, so the left fraction's denominator is the same as the right 4a + 11b is the LCD

6. Tresag Group Title

ok

7. Tresag Group Title

so how do I find the lowest term ?

8. Tresag Group Title

9. gaara438125 Group Title

since the right side's denominator is already 4a + 11b we have to multiply the left sides to look like that as well we're missing a B so we multiply the numerator and denominator by B/B so it now looks like $\frac{ 16a^2b }{ 4a + 11b } - \frac{ 121b^2 }{ 4a + 11b }$

10. gaara438125 Group Title

$\frac{ 16a^2 - 121b^2 }{ 4a + 11b }$

11. Tresag Group Title

ok