12

-12

81

-81

$$3^7$$

$$3^8$$

243

729

$$\frac{25n^4}{9m^2}$$

$$\frac{9n^4}{25m^2}$$

$$\frac{25n^2}{9m^4}$$

$$\frac{9n^2}{25m^4}$$

$$\frac{3^6y^{10}z}{x^3}$$

$$\frac{3^8y^{10}z}{x^3}$$

$$\frac{3^4y^{10}z^2}{x^3}$$

$$\frac{3^{10}y^6z^3}{x^2}$$

$$\frac{x^3}{2y^2}$$

$$\frac{2x^3}{y^2}$$

$$\frac{2x^2}{y^3}$$

$$\frac{x^2}{2y^3}$$

8

-8

$$-\ \sqrt[]{64}$$

ถูกทุกข้อ

$$18\ \sqrt[]{2}$$

$$19\ \sqrt[]{2}$$

$$20\ \sqrt[]{2}$$

$$21\ \sqrt[]{2}$$

$$2\ \sqrt[]{7}$$

$$3\ \sqrt[]{7}$$

$$7\ \sqrt[]{2}$$

$$7\ \sqrt[]{3}$$

$$6\ \sqrt[3]{4}$$

$$6\ \sqrt[3]{2}$$

$$3\ \sqrt[3]{4}$$

$$3\ \sqrt[3]{2}$$

$$-27-2\ \sqrt[]{10}$$

$$-27-16\ \sqrt[]{10}$$

$$27-2\ \sqrt[]{10}$$

$$-27+16\ \sqrt[]{10}$$

$$\left(27a^{ }\right)^{\frac{1}{6}}$$

$$\left(9a^{ }\right)^{\frac{1}{2}}$$

$$\left(3a^{ }\right)^{\frac{1}{2}}$$

$$81a^{ }$$

$$\frac{\sqrt[]{5}\ -\ \sqrt[]{3}}{2}$$

$$\sqrt[]{5}\ +\ \sqrt[]{3}$$

$$\frac{\sqrt[]{5}\ -\ \sqrt[]{3}}{3}$$

$$\sqrt[]{5}\ -\ \sqrt[]{3}$$