a ^ 3b ^ -2 / ab ^ -4, a ≠ 0, b ≠ 0 First we rewrite the expression respecting the properties of the exponents. b ^ -2 = 1 / b ^ 2 1 / b ^ -4 = b ^ 4 We have then: a ^ 3b ^ -2 / ab ^ -4 a ^ 3b ^ 4 / ab ^ 2 answer: An expression using positive exponents is D a^3b^4/ab^2
