Finding the LCD of Rational Equations

What number could be a common denominator for these two fractions?
2/3   and   3/4

• 3

• 4

• 7

• 12

What number could be a common denominator for these two fractions?
1/5   and   5/6?

• 30

• 11

• 6

• 5

What must you have to add and subtract fractions?

• Common numerators

• Different numerators

• Different denominators

• Common denominators

Identify the LCD.

• x²(x - 2)

• x(x - 2)

• x

• (x - 2)

Find the LCD of these fractions.

• (x+2)(x-2)

• (x+2)

• (x-2)

• (x²-4)(x+2)

Find the LCD of these fractions.

• (x+2)(x-2)

• (x+2)(x+1)

• (x+2)(x-2)(x+1)

• (x-2)(x+1)

Find the least common denominator of the expression

• 18

• 6x

• 3xy

• 6xy