The expression (9m)^4 without exponents is 6561m^4, obtained by multiplying 9m by itself four times.
To write (9m)^4 without exponents, you need to multiply 9m by itself four times. This is because raising a number to a power, such as 4, indicates that you multiply the base number by itself 4 times (as indicated in A.5 Integer Powers section). So, (9m)^4 can be expressed as:
9m × 9m × 9m × 9m
Calculating each step, we get:
9m × 9m = 81m^2 (since 9 × 9 = 81 and m × m = m^2)
81m^2 × 9m = 729m^3
729m^3 × 9m = 6561m^4
Therefore, (9m)^4 written without exponents is 6561m^4.