Question

128 raise to two - 28 raise to 2 solve using identity

(- is minus)

Answer 1

$\boxed{\boxed{\boxed{\bold{\red{Solution :\longrightarrow}}}}}$

$\bold{= {128}^{2} - {28}^{2}} \\ \\ \bold{= (128 + 28)(128 - 28)} \\ \\ = \bold{156 \times 100} \\ \\ \bold{= 15600} \: \: \: \boxed{\bold{\green{ Ans}}}$