1) (sqrt(89) - 1)^2= (√89 - 1)^2= (9.43398 - 1)^2= (8.43398)^2≈ 70.773
2) 88 - 2sqrt(89)= 88 - 29.43398= 88 - 18.86796≈ 69.132
3) 90 - 2sqrt(89)= 90 - 29.43398= 90 - 18.86796= 71.132
4) 88
1) (sqrt(89) - 1)^2
= (√89 - 1)^2
= (9.43398 - 1)^2
= (8.43398)^2
≈ 70.773
2) 88 - 2sqrt(89)
= 88 - 29.43398
= 88 - 18.86796
≈ 69.132
3) 90 - 2sqrt(89)
= 90 - 29.43398
= 90 - 18.86796
= 71.132
4) 88