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Verified answer
Bab Bilangan IrrasionalMatematika SMP Kelas IX
(√5 + 7) (√5 + 9) = (√5)² + 9√5 + 7√5 + (9 x 7)
= 5 + 16√5 + 63
= 68 + 16√5
terima kasih
Verified answer
(√5+7)(√5+9)=> (√5)² + 9(√5) + 7(√5) + 7(9)
=> 5 + 63 + 9√5 + 7√5
=> 68 + 16√5