Kak tolong bantu kak pakai cara ya kak ​

E = k × q1 × q2 / r²

E = (9 × 10^9) × (8 × 10^-6) × [(-5) × 10^-6] / (1 × 10^-1)²

E = (72 × 10^3) × [(-5) × 10^-6] / 1 × 10^-2

E = -360 × 10^-3 / 1 × 10^-2

E = -360 × 10^-1

E = -36