1) 20 – 2 x 4! + 2!
= ?
2) x + 9 × 2 = 27
x = ?
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Quiz!!
1. 20 – 2 × 4! + 2!
= ?
2. x + 9 × 2 = 27
x = ?
Penyelesaian :
1. 20 – 2 × 4! + 2!
= 20 – 2 × (4 × 3 × 2 × 1) + (2 × 1)
= 20 – 2 × (12 × 2 × 1) + 2
= 20 – 2 × (24 × 1) + 2
= 20 – 2 × 24 + 2
= 20 – 2 × 24 + 2
= 20 – 48 + 2
= -28 + 2
=
2. x + 9 × 2 = 27
27 = x + 9 × 2
27 = x + 18
x = 27 – 18
x =
Kesimpulan :
1. Hasil dari 20 – 2 × 4! + 2! adalah (–26)
2). Nilai x adalah 9
Jawaban:
1.) -26
2.) x = 9
Penjelasan dengan langkah-langkah:
1) 20 – 2 × 4! + 2!
= 20 – 2 × (4 × 3 × 2 × 1) + (2 × 1)
= 20 – 2 × 24 + 2
= 20 – 48 + 2
= -28 + 2
= -26
2) x + 9 × 2 = 27
x + 18 = 27
x = 27 – 18
x = 9