Question 904967
{{{6k^3-k^2-15k =k(6k^2-k-15)}}}
{{{6k^3-k^2-15k =k(2k+3)(3k-5)}}}
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{{{64b^2-25c^2 =(8b-5c)(8b+5c)}}}
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{{{2x^2+2x+24=0}}}
{{{x^2+x+12=0}}} Prime