Question

9x²-16y²

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Answer 1

Step-by-step explanation:

(9x²)-(16y²)

(3x)²-(4y)²

use

a²-b²=(a-b) (a+b)

(3x+4y)(3x-4y)

Answer 2

Step-by-step explanation:

using formula

${a}^{2} - {b}^{2} = (a - b)(a + b)$

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