SOLUTION: Hi, I need to multiply (3x+9)^2...my answer is 3x^2+27x+81...am I right???

Question 84719: Hi, I need to multiply (3x+9)^2...my answer is 3x^2+27x+81...am I right???
Answer by bucky(2189) (Show Source): You can put this solution on YOUR website!
Given:
.

.
This translates to:
.

.
Take the 3x in the first set of parentheses and multiply it by both terms in the second set
of parentheses. The result is:
.

.
Each of these answers is as follows:
.

.
Next take the second term in the first set of parentheses. This second term is +9. Multiply
it by both of the terms in the second set of parentheses. The result is:
.

.
And the two answers are:
.

.
Now add the two answers that you got:
.

.
You can then add the two 27x terms and you get the final answer:
.

.
That's the answer you should have gotten. Hopefully this will help you to find what you
did incorrectly to get two of the terms wrong in your answer.
.

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