Respuesta :

Answer:

9x-16y2

Step-by-step explanation:

Combine like terms! 3 x 3= 9   -4y2 x 4y2= -16

9x-16y2

Answer:

[tex]point \\ (a + b)(a - b) = {a}^{2} - {b}^{2} \\ so \: we \: have \: \\ ({3x})^{2} - ({4 {y}^{2} })^{2} = 9 {x}^{2} - 16 {y}^{4} [/tex]

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