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soccerbabe239
factor 4y^2-9
It is of the form a² - b² = (a + b)(a - b). Here: a² = 4y² and b² = 9. So if you can figure out a and b, you can factor it!
would it be (4y+3)(4y-3) ?
Close, but not quite. 4*4 = 16.
\[a^2 = 4y^2\]Take square root of both sides \[a=\sqrt{4y^2} = ?\]
oh haha so it would be (2y+3)(2y-3)
By the way, learning to recognize difference of squares like this is an important trick in your bag of factoring tricks.
okay! haha blonde moment! :)
We all have that once in a while!
haha this is my 6 th one today :/
And whenever you think you've solved something, or factored it, it's not a bad idea at all to expand it out or plug in the solution and make sure that your answer works!
You used them up for the whole week already!
Might have to wear a wig for a few days ;-)
haha thanks guys! and its natural I cant help it. and the wig wouldnt hide anything. honestly ive tried that and it didn't work:(
Just learn to live with it ;)
haha I do! I just accept im a natural blonde but at least im not a bimbo!
Good luck with your maths problems!
I have a friend who is a natural brunette, but she prefers to be blonde, and often pulls it off quite convincingly :-)