Baholash
2\left(\sqrt{7}-2\right)\approx 1,291502622
Baham ko'rish
Klipbordga nusxa olish
\frac{6\left(\sqrt{7}-2\right)}{\left(\sqrt{7}+2\right)\left(\sqrt{7}-2\right)}
\frac{6}{\sqrt{7}+2} maxrajini \sqrt{7}-2 orqali surat va maxrajini koʻpaytirish orqali ratsionallashtiring.
\frac{6\left(\sqrt{7}-2\right)}{\left(\sqrt{7}\right)^{2}-2^{2}}
Hisoblang: \left(\sqrt{7}+2\right)\left(\sqrt{7}-2\right). Ko‘paytirish qoida yordamida turli kvadratlarga aylantirilishi mumkin: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.
\frac{6\left(\sqrt{7}-2\right)}{7-4}
\sqrt{7} kvadratini chiqarish. 2 kvadratini chiqarish.
\frac{6\left(\sqrt{7}-2\right)}{3}
3 olish uchun 7 dan 4 ni ayirish.
2\left(\sqrt{7}-2\right)
2\left(\sqrt{7}-2\right) ni olish uchun 6\left(\sqrt{7}-2\right) ni 3 ga bo‘ling.
2\sqrt{7}-4
2 ga \sqrt{7}-2 ni ko'paytirish orqali distributiv xususiyatdan foydalanish.
Misollar
Ikkilik tenglama
{ x } ^ { 2 } - 4 x - 5 = 0
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Chiziqli tenglama
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Arifmetik
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Matritsa
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simli tenglama
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differensatsiya
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Oʻngga
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Chegaralar
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}