1.

-[8a²-{7a²-[6a²-(5a²-a²+8)]}]​

Answer»

Step-by-step EXPLANATION:

-[8a²-{7a²-[6a²-4a²+8]}]

-8a²-[7a²-2a²+8]

-8a²-5a²+8

-13a² = -8

a²=8/13



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