Jika n memenuhi (n – 3) : -5 = 2, maka nilai n pangkat 2 – 3n =

Jawab:

Penjelasan dengan langkah-langkah:

(n-3) : -5 = 2

n – 3 = 2 × (-5)

n – 3 = -10

n = -10 + 3

n = -7

maka,

n^2 – 3n = (-7)^2 – 3(-7) = 49 + 21 = 70