Question

Найдите значение выражения ( 13 − 23 )( 13 + 23 )

Answer 1

(13 - 23) (13 + 23) = -10(13 + 23) = -10 * 36 = -360

Answer 2

=

${13}^{2} - {23}^{2} = 169 - 529 = - 360$