Question

Solve (81x²-64y²) with using this equation a²-b²=(a+b)(a-b)

Answer 1

Answer:

$81 {x}^{2} - 64 {y}^{2} \\ = ( {9x})^{2} - ( {8y})^{2} \\ = (9x + 8y)(9x - 8y)$