What is the answer to (x-2)(x+2)

2 answers:

6 0

Using FOIL (First, Inside, Out, Last), you have to multiply. First: multiply x and x Outside: Multiply x and +2 Inside: Multiply -2 and x Last: Multiply -2 and +2. Finally, add it all together, and you will get x^2-4

Talja [164]2 years ago

3 0

(x - 2)(x + 2)
(x² + 2x - 2x - 4)
x² - 4

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Hey DatGamer13!

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IRISSAK [1]

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$\dfrac12+\dfrac14+\dfrac18+\cdots+\dfrac1{64}$

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To do this, notice that the denominator in each term is a power of 2, starting with $2^1=2$ and ending with $2^6=64$ . So in sigma notation, this series is