Question

factorise x^3 -27y^3 -9x^2 y +27xy^2 on brainly

Answer 1

$Hey \: friend \: here \: is \: your \: answer. \\Please \: mark \: my \: answer \: as \: the \\ BRILLIANIST \\ ANSWER. \\ x³ \: - \:27y³\: - \: \:9x²y \:+ \:27xy² \\ As \: we \: know \\ = {\: x\: -\: y \:}³ \:=\: x³ \:- \:y³\: - \:3xy \:(\: x \:- \:y \:)\\= {\: x\: -\: y \:}³ \:=\: x³ \:- \:y³\: - \:3xy \:(\: -x \:)-3xy (\:-y \:)\\ = = {\: x\: -\: y \:}³ \:=\: x³ \:- \:y³\: - \:3x²y \: 3xy² \\ So\: we\: will \:use\: this \:formula.$