Question

Rationalitatea fractiei 12 pe √12 si 21 pe √28 va rog am nevoie urgent

Answer 1

Răspuns:

    $\frac{12}{\sqrt{12}}=\frac{12}{2\sqrt{3}}=\frac{\not12\sqrt{3}}{\not6}=\boxed{2\sqrt{3}}$

    $\frac{21}{\sqrt{28}}=\frac{21}{2\sqrt{7}}=\frac{\not21\sqrt{7}}{\not14}=\boxed{\frac{3\sqrt{7}}{2}}$