Aromātai
28\sqrt{5}+69\approx 131.60990337
Whakaroha
28 \sqrt{5} + 69 = 131.60990337
Tohaina
Kua tāruatia ki te papatopenga
4\left(\sqrt{5}\right)^{2}+28\sqrt{5}+49
Whakamahia te ture huarua \left(a+b\right)^{2}=a^{2}+2ab+b^{2} hei whakaroha \left(2\sqrt{5}+7\right)^{2}.
4\times 5+28\sqrt{5}+49
Ko te pūrua o \sqrt{5} ko 5.
20+28\sqrt{5}+49
Whakareatia te 4 ki te 5, ka 20.
69+28\sqrt{5}
Tāpirihia te 20 ki te 49, ka 69.
4\left(\sqrt{5}\right)^{2}+28\sqrt{5}+49
Whakamahia te ture huarua \left(a+b\right)^{2}=a^{2}+2ab+b^{2} hei whakaroha \left(2\sqrt{5}+7\right)^{2}.
4\times 5+28\sqrt{5}+49
Ko te pūrua o \sqrt{5} ko 5.
20+28\sqrt{5}+49
Whakareatia te 4 ki te 5, ka 20.
69+28\sqrt{5}
Tāpirihia te 20 ki te 49, ka 69.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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