If 3x-4y=5 and xy=4, find : 27x³-64y³ – InterviewSolution

1.

If 3x-4y=5 and xy=4, find : 27x³-64y³

Answer»

Step-by-step explanation:

27x3 – 64x3 = (3X)3 – (4y)3. = (3x – 4y)3 (3x – 4y)3 + 3 (3x)(4y) (3x – 4y). [∵ A3 – b3 = (a – b)3 + 3AB(a – b). = (5)3

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