Odpowiedź :
a)
3/ √5 = 3*√5 / √5*√5 = 3√5 / 5
b)
3/ 1 -√2 = 3 * √2 / 1* √2 *√2 = 3√2 / -1
3/ √5 = 3*√5 / √5*√5 = 3√5 / 5
b)
3/ 1 -√2 = 3 * √2 / 1* √2 *√2 = 3√2 / -1
3/√5 × √5/√5 = 3×√5/√5×√5 = 3√5/5
3/1-√2 = 3 + √2/(1-√2)(1+√2) = 3+√2/1 - 2 = 3 - 3√2/-1
3/1-√2 = 3 + √2/(1-√2)(1+√2) = 3+√2/1 - 2 = 3 - 3√2/-1
a)
3/√5 = 3/√5 x √5/√5 = 3√5/5
b)
3/1-√2 = 3/1-√2 X 1- √2/1-√2 = (3 - 3√2)/-2
3/√5 = 3/√5 x √5/√5 = 3√5/5
b)
3/1-√2 = 3/1-√2 X 1- √2/1-√2 = (3 - 3√2)/-2