Simplify (-3x^2)(5x^-3)
(-3x^2)(5x^-3)
$$\\(-3x^2)(5x^{-3})\\ =-3x^2\;\;*\;\;5x^{-3}\\ =-3*5*x^2*x^{-3}\\ =-15*x^{2-3}\\ =-15x^{-1}\\ or\\ =-\frac{15}{x}$$