Baholash
\frac{\sqrt{7}+5}{18}\approx 0,424763962
Baham ko'rish
Klipbordga nusxa olish
\frac{5+\sqrt{7}}{\left(5-\sqrt{7}\right)\left(5+\sqrt{7}\right)}
\frac{1}{5-\sqrt{7}} maxrajini 5+\sqrt{7} orqali surat va maxrajini koʻpaytirish orqali ratsionallashtiring.
\frac{5+\sqrt{7}}{5^{2}-\left(\sqrt{7}\right)^{2}}
Hisoblang: \left(5-\sqrt{7}\right)\left(5+\sqrt{7}\right). Ko‘paytirish qoida yordamida turli kvadratlarga aylantirilishi mumkin: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.
\frac{5+\sqrt{7}}{25-7}
5 kvadratini chiqarish. \sqrt{7} kvadratini chiqarish.
\frac{5+\sqrt{7}}{18}
18 olish uchun 25 dan 7 ni ayirish.
Misollar
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Chegaralar
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