Question

(3x-7y)(3x-7y)(3x-7y)

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

$(3x - 7y)(3x7y)(3x - 7y)$

$= (9 {x}^{2} - 21xy - 21xy + 49 {y}^{2} )(3x - 7y)$

$= 18 {x}^{3} - 63 {x}^{2} y - 63 {x}^{2} y + 147x {y}^{2} - 63 {x}^{2} y + 147x {y}^{2} + 14 + x {y}^{2} - 343 {y}^{2}$

$= 18 {x}^{2} - 189 {x}^{2} y + 441x {y}^{2} - 343 {y}^{2}$

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