Question

How do you solve: 9x(squared) - 16y(squared)

Answer 1

${9x}^{2} - 16 {y}^{2} \\ = ( {3x)}^{2} - {(4y)}^{2} \\ = (3x + 4y)(3x - 4y)$

Answer 2

(3x-4y)(3x+4y) = 9x(squared) -16y(squared)