Least Common Denominator (Day 2) (U4L2)

• Greatest Common Factor (GCF)

• Multiply Add Chart

• Difference of Perfect Squares

What will the two factors of this denominator be?

• (x+8)(x-1)

• (x+8)(x+1)

• (x+7)(x+1)

Why don't we have (x+1)² in our LCD?

• Mossler made a mistake oops!

• Because we only use unique factors, and since it happens on each fraction, we only need to use it once.

• Because the second on had a (x-1) also

Why did we multiply by 2/2 to get 4/6a² ?

• because its the only factor missing in the numerator

• because we needed 4 in the numberator

• because 6 is the least common multiple of 3 and 6 so getting 6a² would be the LCD

What is the answer?

• A

• B

• C

• D