The Total solution for NCERT class 6-12
3x – 2y = 11 and xy = 12 Cubing both sides,(3x – 2y)3 = (11)3⇒ (3x)3 – (2y)3 – 3 x 3x x 2y(3x – 2y) =1331⇒ 27x3 – 8y3 – 18xy(3x -2y) =1331⇒ 27x3 – 8y3 – 18 x 12 x 11 = 1331⇒ 27x3 – 8y3 – 2376 = 1331⇒ 27X3 – 8y3 = 1331 + 2376 = 3707∴ 2x3 –8y3 = 3707