Question

(2a - b)(2a + b) is equal to​

Answer 1

$(x - y)(x + y) = x {}^{2} - y {}^{2}$

(2a)² - b²

4a² - b²

Answer 2

$\Huge\mathrm\red{Answer:}$

$\sf{ }$

$\bf{{\underline{To~solve}}:}$

$\sf{~~~~~~~~~~(2a-b)(2a+b)}$

$\bf{Identity:~(a+b)(a-b)=a^{2}-b^{2}}$

$\sf{:\implies (2a)^{2}-(b)^{2}}$

‎$\sf{:\implies {\red{\underline{\boxed{\bf 4a^{2}-b^{2}}}}}}$