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= (10 + 2)(10 - 2)
= 100 - 20 + 2o - 4.3
= 100 -12
= 88
= (10 + 2√3) × (10 - 2√3)
= 100 - 4√9
= 100 - 4(3)
= 100 - 12
= 88
Jadi, luas persegi panjang tersebut adalah 88.