\(64 x^{3} -125\)
= \((4x)^{3} - 5^{3}\) ------> because, \((4x)^{3}\) is same as 64x³ and
\(5^{3}\) is same as 125
Using the formula: \(a^{3}- b^{3} =(a-b)(a ^{2} +ab+b ^{2} )\), we get,
= \((4x -5)((4x)^{2} +4x*5+ 5^{2} )\)
= \((4x -5)(16 x^{2} +20x+25)\) ------>that's your answer!!
