Question

a2-b2 gfgftfgfgfgfgfgfgfghfgfgfhfghfgfgfgfgf

Answer 1

${a}^{2} - {b}^{2} = (a + b)(a - b) \\ \\ \\ verify \\ (a + b)(a - b) = a(a - b) + b(a - b) \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = {a }^{2} - ab + ba - {b}^{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = {a}^{2} - {b}^{2}$