Zapisz w postaci jednej potęgi: (7⁹:49⁻⁵)² × 7⁻⁴⁰ tam na końcu powinno być napisane do potęgi -40

(7⁹:49⁻⁵)² × 7⁻⁴⁰= =(7⁹:(7²)⁻⁵)² × 7⁻⁴⁰= =(7⁹:7⁻¹⁰)² × 7⁻⁴⁰= =(7⁹⁺¹⁰)² × 7⁻⁴⁰= =(7¹⁹)² × 7⁻⁴⁰= =7³⁸ × 7⁻⁴⁰=7⁻²

(7⁹:7⁻¹⁰)² × 7⁻⁴⁰ = (7¹⁹)² × 7⁻⁴⁰ = 7³⁸ × 7⁻⁴⁰ = 7⁻²

(7⁹:49⁻⁵)² × 7⁻⁴⁰=7(⁹₋(₋¹⁰))⁺²⁻⁴⁰=7₋² 7 do -2