Question

24 supra √3 + 30 supra 5√3 - 42 supra 7√3 + 36 supra √3

Answer 1

Rationalizam numitorii, adica amplificam fiecare fractie cu radical din 3
$=\frac{24\sqrt{3}}{3}+\frac{30\sqrt{3}}{15}-\frac{42\sqrt{3}}{21}+\frac{36\sqrt{3}}{3} \\ \\ =8\sqrt{3}+2\sqrt{3}-2\sqrt{3}+12\sqrt{3} \\ \\ =20\sqrt{3}$