Question

please solve this question​

Answer 1

Step-by-step explanation:

Just use

${(a + b)}^{2} = a^{2} + {b}^{2} + 2ab \\ \\ {(a - b)}^{2} = {a}^{2} + {b}^{2} - 2ab \\ \\ (a - b)(a + b) = {a}^{2} - {b}^{2} .$