Aromātai
8
Tauwehe
2^{3}
Tohaina
Kua tāruatia ki te papatopenga
\left(2\sqrt{5}-2\right)\left(\sqrt{5}+1\right)
Tauwehea te 20=2^{2}\times 5. Tuhia anō te pūtake rua o te hua \sqrt{2^{2}\times 5} hei hua o ngā pūtake rua \sqrt{2^{2}}\sqrt{5}. Tuhia te pūtakerua o te 2^{2}.
2\left(\sqrt{5}\right)^{2}+2\sqrt{5}-2\sqrt{5}-2
Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o 2\sqrt{5}-2 ki ia tau o \sqrt{5}+1.
2\times 5+2\sqrt{5}-2\sqrt{5}-2
Ko te pūrua o \sqrt{5} ko 5.
10+2\sqrt{5}-2\sqrt{5}-2
Whakareatia te 2 ki te 5, ka 10.
10-2
Pahekotia te 2\sqrt{5} me -2\sqrt{5}, ka 0.
8
Tangohia te 2 i te 10, ka 8.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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Poukapa
\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]
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Whakarerekētanga
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Whakaurunga
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Ngā Tepe
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