DeadShot
What is the simplified form of the quantity xsquared minus 16 over the quantity x plus 4 ?



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DeadShot
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\[\frac{ x^216 }{ (x+4) }\]

geerky42
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\[\dfrac{x^2  16}{x+4}\]
I'd factor the numerator if I were you.

geerky42
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Remember the differences of squares? \[x^2  a^2 = (xa)(x+a)\]

DeadShot
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so then, the numerator would be \[(x+4)(x4)\]right?

geerky42
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Right.

DeadShot
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and then the (x+4) would cancel each other out

geerky42
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Yes

DeadShot
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leaving the answer as x  4, with the restriction x ≠ 4

geerky42
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Yeah.

DeadShot
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Thanks!

geerky42
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Glad I helped.

Sigmon11
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x4, I did that one in my head

geerky42
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Good for you.