计算:(5a²+2a-1)-4(3-8a+2a²)
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计算:(5a²+2a-1)-4(3-8a+2a²)
(5a²+2a-1)-4(3-8a+2a²)
=5a²+2a-1-12+32a-8a²
=(5a²-8a²)+(2a+32a)+(-1-12)
=-3a²+34a-13
(5a²+2a-1)-4(3-8a+2a²)
=5a²+2a-1-12+32a-8a²
=-3a²+34a-13
原式=5a²+2a-1-12+32a-8a²=-3a²+34a-13
原式=5a²+2a-1-12+32a-8a²
=-3a²+34a-13