1.

-72a^4b^5c^8-(-9a^2b^2c^3)​

Answer»

Step-by-step EXPLANATION:

-72a⁴b^5c^8-(-9a²b²c³)

= -72a⁴b^5c^8+9a²b²c³

= 9a²b²c³(-8a²b³c^5+1)



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