Posted by crystal on Wednesday, February 8, 2012 at 5:31pm.
1. x^-7*x^4 = X^-3 = 1/X^3.
2. 5x^-4*x^4 = 5x^0 = 5.
3. 7x^0*y^-3 = 7y^-3 = 7/Y^3.
NOTE: Remember to multiply the coefficients and add the exponents.
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