Question

solve this ............

Answer 1

Answer:

8z^3-343y^3-42zy(8z-7y)

Step-by-step explanation:

Using formula: (a-b) ^3=a^3-b^3-3ab(a-b)

Answer 2

simply we put the the formula of

${(a - b)}^{3} \\ {a}^{3} - {b}^{3} - 3 {a}^{2} b + 3a {b}^{2} \\ 8 {z}^{3} - 343 {y}^{3} - (3 \times 4z \times 7y )+ (3 \times 49y \times 2z) \\ 8 {z}^{3} - 343 {y}^{3} - 84{z}^{2} y + 294 {y}^{2} z$