Question

simply (2x-5y)³ - (2x+5y)³​

Answer 1

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$using \: (a - b) ^{3} - ( {a + b})^{3 } = - 6 {a}^{2}b - 2 {b}^{3} \\ ({2x - 5y})^{3} - ( {2x + 5y)}^{3} \\ = - 6( {2x}) ^{2} 5y - 2( {5y})^{3} \\ = - 6.4 {x}^{2} .5y - 2. 125{y}^{3} \\ = - 120 {x}^{2} y - 250 {y}^{3}$

Answer 2

Step-by-step explanation:

Hope it helps to you all.