Simplifying Rationals

Simplify. 

• (x+6)/(x+4)
• (x+6)(x+4)
• (x+6)
• (x+6)/(x-5)

• 3x

Simplify.

• n-7

• n-6

Simplify

Hint:(bottom is difference of squares)

• (x-9)/(x+9)

• 1/(x-9)

• (x+9)

• 1/(x+9)

Simplify the following

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• No values are restricted.

Which expression is already simplified?

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What value(s) make the expression undefined?

• x = - 3 and x = 4
• x = 3 and x = - 4
• x = 3 only
• x = - 4 only