SOLUTION: Simplify ( 3x + 4y) ( 3x � 4y)

Question 177315: Simplify ( 3x + 4y) ( 3x � 4y)
Found 2 solutions by jim_thompson5910, dini:
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

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:.

---------------------------------------------------

Now collect every term to make a single expression.

Now combine like terms.

So FOILs to .

In other words, .

Answer by dini(5) (Show Source): You can put this solution on YOUR website!
(3x+4y)*(3x-4y)
=3x3x-3x4y+3x4y-4y4y
=9x^2-12xy+12xy-16y^2
=9x^2-16y^2
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