question help: Math question: (3x-2y)^2= - Help.com

Math question: (3x-2y)^2=

the answer is 9x^2 + 4y^2 - 12xy

not sure how to get to that answer

This open post was written 1 year ago | V/U/S: 424, 5, 2 | Edit Post | Leave a reply | Report Post


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Since writing this post shayb89 may have helped people, but has not within the last 4 days. shayb89 is a verified member, has been around for 3 years, 1 month and has 3 posts and 3 replies to their name.

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kai_do offline Verified User (3 years, 6 months) Long Term User Shouts: 4 #
An Unknown Location | 1 year ago (21 minutes after post)

ok. lets see : (3x-2y)^2 = (3x-2y)*(3x-2y) = ((3x*3x)-(3x*2y)-(2y*3x)+ (2y*2y)) = ((9x^2) - (6xy)-(6xy)+ (4y^2)) = 9x^2 - 12xy + 4y^2
Hope this helps.

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shayb89 offline Verified User (3 years, 1 month) Long Term User Shouts: 0 #
An Unknown Location | 1 year ago (24 minutes after post)

Thank you! is there a name for the 2nd step?

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Help me with: (1/x)+(1/a)=(1/b)
kai_do offline Verified User (3 years, 6 months) Long Term User Shouts: 4 #
An Unknown Location | 1 year ago (33 minutes after post)

The 2nd step? You mean when i re-wrote (3x-2y)^2 to (3x-2y)*(3x-2y)? I don’t know the name in English i am afraid :/
But for math- questions here is the most awesome site : www.wolframalpha.com
they even show you the steps from time to time.
And now you can ask them questions about life :D

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shayb89 offline Verified User (3 years, 1 month) Long Term User Shouts: 0 #
An Unknown Location | 1 year ago (40 minutes after post)

awesome! Thanks again!

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Help me with: (1/x)+(1/a)=(1/b)
kai_do offline Verified User (3 years, 6 months) Long Term User Shouts: 4 #
An Unknown Location | 1 year ago (43 minutes after post)

you’re wlc :)

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