C-03-Q079mediumsingle_mcqIf x−y=8x-y=8x−y=8 and xy=5xy=5xy=5, x3−y3+8(x+y)2=?x^3 - y^3 + 8(x+y)^2 = ?x3−y3+8(x+y)2=?a130413041304b632632632c672672672d102410241024ব্যাখ্যাHere x3−y3=(x−y)3+3xy(x−y)=512+120=632x^3-y^3=(x-y)^3+3xy(x-y)=512+120=632x3−y3=(x−y)3+3xy(x−y)=512+120=632, and (x+y)2=(x−y)2+4xy=64+20=84(x+y)^2=(x-y)^2+4xy=64+20=84(x+y)2=(x−y)2+4xy=64+20=84 gives 8(x+y)2=6728(x+y)^2=6728(x+y)2=672. The sum is 632+672=1304632+672=1304632+672=1304.