SOLUTION: Help. the problem is (3x -2y)*the second power the answer is 9x* -12xy +4y* and I'm not getting that, I'm missing a step showing -12xy is there anyway you can break down e

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Question 124991: Help. the problem is (3x -2y)*the second power
the answer is 9x* -12xy +4y*
and I'm not getting that, I'm missing a step showing -12xy
is there anyway you can break down each step to show 9x* -12xy +4y
Answer by checkley71(8403) (Show Source):
You can put this solution on YOUR website!
I'LL GIVE YOU AN EXAMPLE THAT MIGHT EXPLAIN HOW I GOT THE MIDDLE TERMS.
MULTIPLY 63 BY 22.
-------63
-------22
---------------------------------
------126
-----126
--------------------------------
-----1386 WHERE DID I GET THE 3 & 8?
ANSWER - BY ADDING THE INTERIM (MIDDLE) VALUES.
ONE WAY TO SEE HOW THIS IS ACCOMPLISHED IS TO MULTIPLY USING THE OLD FASHIONED METHOD AS FOLLOWS:
3X-2Y
3X-2Y
------------------------------
9X^2-6XY-6XY+4Y^2 THE 9X^2=3X*3X, THE -6XY=3X*-2Y, THE OTHER -6XY=-2Y*3X &
-2Y*-2Y=4Y^4 NOW COMBINE THE XY TERMS.
9X^2-12XY+4Y^2