SOLUTION: how do you simplify (xy+ab^2)(xy-ab^2)

Question 242940: how do you simplify
(xy+ab^2)(xy-ab^2)
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
You could use the difference of squares formula, but let's do it the long way.

Start with the given expression.

Now let's FOIL the expression.

Remember, when you FOIL an expression, you follow this procedure:

Multiply the First terms:.

Multiply the Outer terms:.

Multiply the Inner terms:.

Multiply the Last terms:.

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So we have the terms: , , , and

Now add every term listed above to make a single expression.

Now combine like terms.

So FOILs to .

In other words, .

Note: recall that the difference of squares formula is . So you could have used this formula where in this case and
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