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

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satellite73Best ResponseYou've already chosen the best response.0
\(a^2b^2=(a+b)(ab)\) use \(a=3x,b=2\)
 one year ago

Gungirl4ever1994Best ResponseYou've already chosen the best response.0
what do you mean?
 one year ago

satellite73Best 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

satellite73Best 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

satellite73Best 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

satellite73Best 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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