Question

simpify using suitble identify , (7a-9b)(7a-9b)​

Answer 1

Answer:

vino plans to is so is so me to move

Answer 2

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

$(7a-9b)(7a-9b) = \\ (7a) { }^{2} \: - \: (9b) {}^{2}$

$= 49a { }^{2} - 81b {}^{2}$