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$\begingroup$

OK, I got a new one... it's $36 m^2 - \frac{25}4 $

and I got:

$(18m-\frac{5}2 )(18m+\frac{5}2 )$ although that is incorrect... where did I go wrong?

  • 1
    And $18\times18$ is not 36.2011-10-28

1 Answers 1

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I don't think you are right,since:

$ 36 m^2 - \frac{25}4 = (6m)^2 - \left(\frac{5}2 \right)^2 = \left(6m + \frac{5}2 \right)\left(6m - \frac{5}2 \right) $

  • 0
    Arg... I tried adding instead of multiplying.. thank you.2011-10-28