Math, asked by buttetfield, 1 year ago

if 2a + 3b =15 and ab=10 find the value of 8a³+ 27b³

Answers

Answered by amalikdsharma

2a + 3b = 15
On cubing both the sides,
8a3 + 27b3 +3×6ab(2a + 3b) = 3375
8a3 + 27b3 +18*10(15) = 3375
8a3 + 27b3 + 2700 = 3375
8a3 + 27b3 = 3375 - 2700 = 675

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