Question

using identity evaluate (x - 5y)³​

Answer 1

Answer:

(x-5y)^3

= x^3- 125y^3 answer

Step-by-step explanation:

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Answer 2

Answer:

$(x - 5y)^ 3== x^3 -15x^2y + 75x y^2 - 125y^3$

Step-by-step explanation:

Formula

$(a - b)^3 = a^3 -3a^2b + 3ab^2 -b^3$

$(x - 5y)^ 3= (x)^3 - 3(x)^2 (5y) + 3 x(5y)^2 - (5y)^3\\= x^3 -3x^2 (5y) + 3x (25y^2) - 125y^3\\= x^3 -15x^2y + 75x y^2 - 125y^3$