4º. Por un tostador eléctrico circula una corriente eléctrica cuyo valor es l = 23 A, si la resistencia eléctrica del hilo de cobre
tiene un valor de 10 S2. Calcula el valor de la tensión a la que
está conectado
1 = 23 A
ult
U
+
R = 1022​

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.

The answer would be c.hope this .