Question

(a) no. (2x-1)(2x+1)​

Answer 1

Hi Dear!♥️

(2x-1)(2x+1)

(a+b)(a-b) = a² - b²

by following this,

(2x-1)(2x+1) = (2x)² - (1)²

=> 4x² - 1

Answer 2

Step-by-step explanation:

$(2x - 1)(2x + 1) \\ according \: to \: the \: exponent \\ a {}^{2} - {b}^{2} = (a - b)(a + b) \\ (2x) {}^{2} - (1) {}^{2} \\ 4x {}^{2} - 1$