Domain of Rational Expressions

What is a restriction on the variable?

• A value that makes the denominator equal to 0

• A number that makes the numerator equal to 0

• The solution

• Mr. Jackson smells like pencils.

What values will make the rational expression UNDEFINED?

• None

• -2 and 5

• 2 and -5

• 0, 2, and -5

• 0, -2, and 5

Tags

CCSS.HSF-IF.C.7D

• 0 and 3

• 3

• 3 and -4

• -3

Tags

CCSS.HSF-IF.C.7D

What value(s) make the expression undefined?

• x = - 3 and x = 4

• x = 3 and x = - 4

• x = 3 only

• x = - 4 only

Tags

CCSS.HSA.APR.D.7

State the domain restrictions. 

• x ≠ 3

• x ≠ 0, 3, 4

• x ≠ 0, 4

• x ≠ 4

(-x-5)/(x²+12x+35)

• 1/(x+7)

• 1/(x-7)

• -1/(x+7)

• -1/(x+6)

Tags

CCSS.HSA.APR.D.6

Simplify the expression

• (5x + 4y) / 9y

• (6y + 3x) / 3y

• (2y + x) / y

• (6y + 3x) / 9y 

Tags

CCSS.HSA.APR.D.7

What is the least common multiple of  x²-16 and x²+4x-32?
HINT: Think least common denominator!

• (x + 4)(x – 4)(x + 8)

• (x-4)2 (x+8)

• (x + 4)(x – 4)

• (x - 4)(x-4)2(x + 8)

Tags

CCSS.HSA.APR.D.6