Question

Q.6
If 2x – 5y = 13 and xy = 5, then the value of 8x3 – 125y3 is
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Answer 1

(2x-5y)^3=8x^3-125y^3-3(2x)(5y)(2x-5y)
13^3=8x3-125y^3-30(xy)(13)
2197=8x3-125y3-1950
2197-1950=8x^3-125y^3
247

Answer 2

Answer:

Step-by-step explanation:

Refer the attachment