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October 20, 2014

October 20, 2014

Posted by **Theresse** on Saturday, September 29, 2012 at 2:39pm.

i tried using foil that doesnt appear to work

- algebra -
**Steve**, Saturday, September 29, 2012 at 4:05pmknowing the product of two numbers does not tell you anything about what the numbers are, unless the product is zero.

If the product is zero, then at least one of the numbers must be zero.

(x +2)(x - 2) = 32

x^2 - 4 = 32

x^2 - 36 = 0

(x-6)(x+6) = 0

Now you have two numbers whose product is zero. So, x must be 6 or -6.

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