Question

A fatoração da diferença de quadrado do polinômio x² - 1 é: *
a) (x + 1)(x - 1)
b) (x + 1)(x + 1)
c) (x - 1)(x - 1)
d) (x + 2)(x - 1)​

Answer 1

$x {}^{2} - 1$

$x {}^{2} - 1 {}^{2}$

$(a - b) \times (a + b) = (x - 1) \times (x + 1)$

$\boxed{\boxed{\boxed{\sf (x - 1) \times (x + 1) \: }}}$