Question 175437
#13
{{{(3x-y)(2x+5y)}}}
All that is needed here is foiling
{{{(3x)(2x)+(3x)(5y)+(2x)(-y)+(5y)(-y)}}}
{{{6x^2+15xy-2xy-5y^2}}}
Now we just combine like terms:
{{{6x^2+13xy-5y^2}}}