Baholash
\frac{-4\sqrt{2}-28}{47}\approx -0,716103282
Baham ko'rish
Klipbordga nusxa olish
\frac{4\left(\sqrt{2}+7\right)}{\left(\sqrt{2}-7\right)\left(\sqrt{2}+7\right)}
\frac{4}{\sqrt{2}-7} maxrajini \sqrt{2}+7 orqali surat va maxrajini koʻpaytirish orqali ratsionallashtiring.
\frac{4\left(\sqrt{2}+7\right)}{\left(\sqrt{2}\right)^{2}-7^{2}}
Hisoblang: \left(\sqrt{2}-7\right)\left(\sqrt{2}+7\right). Ko‘paytirish qoida yordamida turli kvadratlarga aylantirilishi mumkin: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.
\frac{4\left(\sqrt{2}+7\right)}{2-49}
\sqrt{2} kvadratini chiqarish. 7 kvadratini chiqarish.
\frac{4\left(\sqrt{2}+7\right)}{-47}
-47 olish uchun 2 dan 49 ni ayirish.
\frac{4\sqrt{2}+28}{-47}
4 ga \sqrt{2}+7 ni ko'paytirish orqali distributiv xususiyatdan foydalanish.
Misollar
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Simli tenglama
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