Question 1017858
FOIL Method
First : {{{2x(2x)=4x^2}}}
Outer: {{{2x(5y)=10xy}}}
Inner :{{{ 7y(2x)=14xy}}}
Last: {{{7y(5y)=35y^2}}}
{{{(2x+7y)(2x+5y)=4x^2+10xy+14xy+35y^2}}}
{{{(2x+7y)(2x+5y)=4x^2+24xy+35y^2}}}