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Gungirl4ever1994
Group Title
Please help!
What is the expression in factored form?
9x2 – 4 (2 points)
 one year ago
 one year ago
Gungirl4ever1994 Group Title
Please help! What is the expression in factored form? 9x2 – 4 (2 points)
 one year ago
 one year ago

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satellite73 Group TitleBest ResponseYou've already chosen the best response.0
\(a^2b^2=(a+b)(ab)\) use \(a=3x,b=2\)
 one year ago

Gungirl4ever1994 Group TitleBest ResponseYou've already chosen the best response.0
what do you mean?
 one year ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.0
you are supposed the recognize \(9x^22\) as the "difference of two squares" \(9x^2\) is the square of \(3x\) and \(4\) is the square of \(2\)
 one year ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.0
in other words you visualize this as \[(3x)^22^2\] and therefore factor like \(a^2b^2=(a+b)(ab)\)
 one year ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.0
if you replace \(a\) by \(3x\) and \(b\) by \(2\) you get \[9x^24=(3x)^22^2=(3x+2)(3x2)\]
 one year ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.0
you can check that this is correct by multiplying \[(3x+2)(3x2)\] and see that you get \(9x^24\)
 one year ago
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