T-T80² – 90 + 23² = .. ​

PENYELESAIAN

80² – 90 + 23²

(80 × 80) – 90 + (23 × 23)

6400 – 90 + 529

6.310 + 529

6.839

= (80.80) – 90 + (23.23)

= 6400 – 90 + 529

= 6310 + 529

= 6.839