Question 45514
{{{(3a - 5)^2}}}
{{{(3a-5)(3a-5)}}}
Use FOIL: (get the product of the firsts, then add the product of the outers, then add the product of the  inners and then add the product of the lasts:)
{{{(3a-5)(3a-5)=9a^2-15a-15a+25}}}
The answer is:
{{{9a^2-30a+25}}}

I hope this helps.
Adam
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