Issolvi 1/R_{1}-1/R_{2}

$$\frac { 1 } { R _ { 1 } } - \frac { 1 } { R _ { 2 } }$$

Evalwa

$$\frac{R_{2}-R_{1}}{R_{1}R_{2}}$$

Passi tas-Soluzzjonijiet

Biex iżżid jew tnaqqas l-espressjonijiet, espandihom biex id-denominaturi tagħhom ikunu l-istess. L-inqas multiplu komuni ta' R_{1} u R_{2} huwa R_{1}R_{2}. Immultiplika \frac{1}{R_{1}} b'\frac{R_{2}}{R_{2}}. Immultiplika \frac{1}{R_{2}} b'\frac{R_{1}}{R_{1}}.

$$\frac{R_{2}}{R_{1}R_{2}}-\frac{R_{1}}{R_{1}R_{2}}$$

Billi \frac{R_{2}}{R_{1}R_{2}} u \frac{R_{1}}{R_{1}R_{2}} għandhom l-istess denominatur, naqqashom billi tnaqqas in-numeraturi tagħhom.

$$\frac{R_{2}-R_{1}}{R_{1}R_{2}}$$

Fattur

$$\frac{-\frac{R_{1}}{R_{2}}+1}{R_{1}}$$