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Verified answer
Aljabar(a + b)² - (a - b)²
Ingat , selisih 2 kuadrat
x² - y² = (x + y)(x - y)
Maka -->
(a + b + (a - b))(a + b - (a - b)
= (a + b + a - b)(a + b - a + b)
= (2a)(2b)
= 4ab