Q. [ 5/5 ]

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78³ + 77² – 5² = ….
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Q. [ 5/5 ]

Penyelesaian:

78³ + 77² – 5²

= (78 × 78 × 78) + 77² – 5²

= (6.084 × 78) + 77² – 5²

= 474.552 + (77 × 77) – 5²

= 474.552 + 5.926 – (5 × 5)

= (474.552 + 5.926) – 25

= 480.478 – 25

= 480.453

Kesimpulan:

Maka, hasilnya adalah 480.453.

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78³ + 77² – 5²

= 78³ + (77 – 5)(77 + 5)

= 78³ + (72)(82)

= 78³ + 5.904

= (78 × 78 × 78) + 5.904

= (6.084 × 78) + 5.904

= 474.552 + 5.904

= 480.456

🙂