Apply the property of negative integer exponents to rewrite 15^-³⁸ as an expression with positive exponents only.
To rewrite 15^-³⁸ with positive exponents only, we can apply the property of negative exponents which states that a^-n = 1/a^n.
Therefore, 15^-³⁸ can be rewritten as 1/15³⁸.
Apply the property of negative integer exponents to rewrite 9^-²⁸ as an expression with positive exponents only.
To rewrite 9^-²⁸ with positive exponents only, we can apply the property of negative exponents which states that a^-n = 1/a^n.
Therefore, 9^-²⁸ can be rewritten as 1/9²⁸.
To rewrite 15^-³⁸ with positive exponents only, we can use the property of negative exponents, which states that a negative exponent can be converted to a positive exponent by taking the reciprocal of the base.
Therefore, we can rewrite 15^-³⁸ as:
1 / (15^³⁸)
This expression has positive exponents only.