Question

343y3_1000
using the above results

Answer 1

Answer:

$343 {y}^{3} - 1000 \\ = (7y)^{3} - (10)^{3} \\ = (7y - 10) \{ ({7y})^{2} + 7y \times 10 + (10) ^{2} \} \\ = (7y - 10) \{ 49y^{2} + 70y + 100 \}$