Question

Soal

9² - 2² = ??

Catatan :
Selamat hari raya idul fitri.. kawan brainly ✌​

Answer 1

Jawaban:

9²

=9×9

=81

2²

=2×2

=4

pertanyaan nya

9²-2²

=81-4

=77

Penjelasan dengan langkah-langkah:

.........

Answer 2

9² - 2²

cara cepat :

= (9 × 9) - 2²

= 81 - 2²

= 81 - (2 × 2)

= 81 - 4

= 77

cara detail :

= (9 + 9) + 9 + 9 + 9 + 9 + 9 + 9 + 9) - (2 + 2)

= (18 + 9) + 9 + 9 + 9 + 9 + 9 + 9) - 4

= (27 + 9) + 9 + 9 + 9 + 9 + 9) - 4

= (36 + 9) + 9 + 9 + 9 + 9) - 4

= (45 + 9) + 9 + 9 + 9) - 4

= (54 + 9) + 9 + 9) - 4

= (63 + 9) + 9) - 4

= (72 + 9) - 4

= 81 - 4

= 77

Kesimpulan hasilnya adalah : 77