Aqbeż għall-kontenut ewlieni
Evalwa
Tick mark Image
Espandi
Tick mark Image

Problemi Simili mit-Tiftix tal-Web

Sehem

49+42\sqrt{2}+9\left(\sqrt{2}\right)^{2}-\left(5-2\sqrt{5}\right)^{2}
Uża teorema binomjali \left(a+b\right)^{2}=a^{2}+2ab+b^{2} biex tespandi \left(7+3\sqrt{2}\right)^{2}.
49+42\sqrt{2}+9\times 2-\left(5-2\sqrt{5}\right)^{2}
Il-kwadrat ta' \sqrt{2} huwa 2.
49+42\sqrt{2}+18-\left(5-2\sqrt{5}\right)^{2}
Immultiplika 9 u 2 biex tikseb 18.
67+42\sqrt{2}-\left(5-2\sqrt{5}\right)^{2}
Żid 49 u 18 biex tikseb 67.
67+42\sqrt{2}-\left(25-20\sqrt{5}+4\left(\sqrt{5}\right)^{2}\right)
Uża teorema binomjali \left(a-b\right)^{2}=a^{2}-2ab+b^{2} biex tespandi \left(5-2\sqrt{5}\right)^{2}.
67+42\sqrt{2}-\left(25-20\sqrt{5}+4\times 5\right)
Il-kwadrat ta' \sqrt{5} huwa 5.
67+42\sqrt{2}-\left(25-20\sqrt{5}+20\right)
Immultiplika 4 u 5 biex tikseb 20.
67+42\sqrt{2}-\left(45-20\sqrt{5}\right)
Żid 25 u 20 biex tikseb 45.
67+42\sqrt{2}-45+20\sqrt{5}
Biex issib l-oppost ta' 45-20\sqrt{5}, sib l-oppost ta' kull terminu.
22+42\sqrt{2}+20\sqrt{5}
Naqqas 45 minn 67 biex tikseb 22.
49+42\sqrt{2}+9\left(\sqrt{2}\right)^{2}-\left(5-2\sqrt{5}\right)^{2}
Uża teorema binomjali \left(a+b\right)^{2}=a^{2}+2ab+b^{2} biex tespandi \left(7+3\sqrt{2}\right)^{2}.
49+42\sqrt{2}+9\times 2-\left(5-2\sqrt{5}\right)^{2}
Il-kwadrat ta' \sqrt{2} huwa 2.
49+42\sqrt{2}+18-\left(5-2\sqrt{5}\right)^{2}
Immultiplika 9 u 2 biex tikseb 18.
67+42\sqrt{2}-\left(5-2\sqrt{5}\right)^{2}
Żid 49 u 18 biex tikseb 67.
67+42\sqrt{2}-\left(25-20\sqrt{5}+4\left(\sqrt{5}\right)^{2}\right)
Uża teorema binomjali \left(a-b\right)^{2}=a^{2}-2ab+b^{2} biex tespandi \left(5-2\sqrt{5}\right)^{2}.
67+42\sqrt{2}-\left(25-20\sqrt{5}+4\times 5\right)
Il-kwadrat ta' \sqrt{5} huwa 5.
67+42\sqrt{2}-\left(25-20\sqrt{5}+20\right)
Immultiplika 4 u 5 biex tikseb 20.
67+42\sqrt{2}-\left(45-20\sqrt{5}\right)
Żid 25 u 20 biex tikseb 45.
67+42\sqrt{2}-45+20\sqrt{5}
Biex issib l-oppost ta' 45-20\sqrt{5}, sib l-oppost ta' kull terminu.
22+42\sqrt{2}+20\sqrt{5}
Naqqas 45 minn 67 biex tikseb 22.