hansamu2812 1) 9^10=9^5+9^5

2) (2/3)^8=(2/3)^4+(2/3)^4

3) (81,4)^6=(81,4)^3+(81,4)^3

4) (-4/11)^15= (-4/11)^7,5+(-4/11)^7,5

5) (-20)^7=(-20)^3,5+(-20)^3,5

6) (46/9)^40=(46/9)^20+(46/9)^20

7) (-0,09)^13=(-0,09)^6,5+(-0,09)^6,5