Whakaoti i te (3sqrt{2})^2-(2sqrt{5})^2

$$( 3 \sqrt { 2 } ) ^ { 2 } - ( 2 \sqrt { 5 } ) ^ { 2 }$$

Aromātai

$$-2$$

Ngā Upane Otinga

Whakarohaina te \left(3\sqrt{2}\right)^{2}.

$$3^{2}\left(\sqrt{2}\right)^{2}-\left(2\sqrt{5}\right)^{2}$$

Tātaihia te 3 mā te pū o 2, kia riro ko 9.

$$9\left(\sqrt{2}\right)^{2}-\left(2\sqrt{5}\right)^{2}$$

Ko te pūrua o \sqrt{2} ko 2.

$$9\times 2-\left(2\sqrt{5}\right)^{2}$$

Whakareatia te 9 ki te 2, ka 18.

$$18-\left(2\sqrt{5}\right)^{2}$$

Whakarohaina te \left(2\sqrt{5}\right)^{2}.

$$18-2^{2}\left(\sqrt{5}\right)^{2}$$

Tātaihia te 2 mā te pū o 2, kia riro ko 4.

$$18-4\left(\sqrt{5}\right)^{2}$$

Ko te pūrua o \sqrt{5} ko 5.

$$18-4\times 5$$

Whakareatia te 4 ki te 5, ka 20.

$$18-20$$

Tangohia te 20 i te 18, ka -2.

$$-2$$

Tauwehe

$$-2$$