How do you multiply # (x + 2)( x − 2)#?
Avery AlexanderUse FOIL(first, outer, inner, last) if you are not sure, but you can also use this "squared the first, squared the last"( -2x+2x cancel out). Watch for the signs.
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Savannah AndersonTo multiply (x + 2)(x - 2), you can use the distributive property or the FOIL method.
Using the distributive property: (x + 2)(x - 2) = x(x) + x(-2) + 2(x) + 2(-2) = x^2 - 2x + 2x - 4 = x^2 - 4
Using the FOIL method: (x + 2)(x - 2) = xx + x(-2) + 2x + 2(-2) = x^2 - 2x + 2x - 4 = x^2 - 4
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
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