`(-7)^9xx(-7)^7=(-7)^(n+6)`

The cube of (- 7 ) =( - 7)xx(- 7)xx(-7)=-343 .

((-3)/7)^7xx((-3)/7)^6xx((-3)/7)^-14 =

Find the product of: (-9) xx (-8) xx (-7) xx (-6)

Verify the following : (-10)xx{(-7)+(-9)}={(-10)xx(-7)}+{(-10)xx(-9)}

Simplify the following: [(7)/(9)-{(7)/(9)-((7)/(9)-(4)/(9))}] of 1.8-0.6-:10

Express the following mathematical operations in scientific notation. (1) (6.6xx10^(5))xx(7.7xx10^(9)) (2) (6.6xx10^(5))xx(7.7xx10^(-7))

Express the following mathematical operations in scientific notation. (1) (6.6xx10^(5))xx(7.7xx10^(9)) (2) (6.6xx10^(5))xx(7.7xx10^(-7))