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Verified answer
Materi: AljabarMisal x = 123456789
shg terbentuk suatu ekspresi aljabar
x^2 - (x+1)(x-1) = x^2 - (x^2-1) = 1.
#selesai
Verified answer
123456789 = a123456790 = 123456789 + 1 = a+1
123456788 = 123456789 - 1 = a-1
(123456789)^2 - (123456790)(123456788)
= a^2 - (a+1)(a-1)
= a^2 - (a^2-a+a-1)
= a^2 - (a^2 - 1)
= 1