Question

(3×-1)elevado a dois parentese-(3×+1)elevado a dois parêntese

Answer 1

Olá Andressa!

$\\ \mathsf{(3x - 1)^2 - (3x + 1)^2 =} \\\\ \mathsf{(9x^2 - 6x + 1) - (9x^2 + 6x + 1) =} \\\\ \mathsf{9x^2 - 9x^2 - 6x - 6x + 1 - 1 =} \\\\ \boxed{\mathsf{- 12x}}$