Jawaban:
D.
m + n = 5
m × n = 6
yaitu bilangan m = 3 dan n = 2
Jadi, m³ - n³ = 3³ - 2³
= 27 - 8
= 19
mn = 6
Kita buktikan satu satu
Jika m = 4 dan n = 1
m + n = 4 + 1 = 5
mn = 4 × 1 = 4 ❌
Jika m = 3 dan n = 2
m + n = 3 + 2 = 5
mn = 3 × 2 = 6 ✔
Maka, m³ - n³
= 3³ - 2³
= (3×3×3) - (2×2×2)
Jadi, m³ - n³ = 19 (D)
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Jawaban:
D.
m + n = 5
m × n = 6
yaitu bilangan m = 3 dan n = 2
Jadi, m³ - n³ = 3³ - 2³
= 27 - 8
= 19
m + n = 5
mn = 6
Kita buktikan satu satu
Jika m = 4 dan n = 1
m + n = 4 + 1 = 5
mn = 4 × 1 = 4 ❌
Jika m = 3 dan n = 2
m + n = 3 + 2 = 5
mn = 3 × 2 = 6 ✔
Maka, m³ - n³
= 3³ - 2³
= (3×3×3) - (2×2×2)
= 27 - 8
= 19
Jadi, m³ - n³ = 19 (D)