Question

Помогите пожалуйста!

Answer 1

$(x + 23y) {}^{2} - (23x + y) {}^{2} \\ = ( \times + 23y - 23 x - y) \\ (x + 23y + 23x + y) = \\ ( - 22x + 22y)(24x + 24y) \\ = - 22(x - y) \times 24(x + y) \\ = - 528(x - y)(x + y) \\ = - 528(x {}^{2} \times y {}^{2} )$