化简(5a²+2a)-4(2+2a²).

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化简(5a²+2a)-4(2+2a²).化简(5a²+2a)-4(2+2a²).化简(5a²+2a)-4(2+2a²).=5a^2+2a-8

化简(5a²+2a)-4(2+2a²).
化简(5a²+2a)-4(2+2a²).

化简(5a²+2a)-4(2+2a²).
=5a^2+2a-8-8a^2
=-3a^2+2a-8

(5a²+2a)-4(2+2a²)
=5a^2+2a-8-8a^2
=(5-8)a^2+2a-8
=-3a^2+2a-8