To multiply the expression (3u+8)(3u-8), we can use the distributive property.
First, multiply the first terms of each binomial:
(3u)(3u) = 9u^2
Next, multiply the outer terms of each binomial:
(3u)(-8) = -24u
Then, multiply the inner terms of each binomial:
(8)(3u) = 24u
Finally, multiply the last terms of each binomial:
(8)(-8) = -64
Now, combine all the terms:
9u^2 - 24u + 24u - 64
The -24u and +24u terms cancel each other out, so the final simplified expression is:
9u^2 - 64
multipy (3u+8)(3u-8)
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