(a+2b)²-8a(a+2b)+16a²
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![(a+2b)²-8a(a+2b)+16a²](/uploads/image/z/2098756-28-6.jpg?t=%28a%2B2b%29%26%23178%3B-8a%28a%2B2b%29%2B16a%26%23178%3B)
(a+2b)²-8a(a+2b)+16a²
(a+2b)²-8a(a+2b)+16a²
(a+2b)²-8a(a+2b)+16a²
(a+2b)²-8a(a+2b)+16a²
=[﹙a+2b﹚+4a]²
=﹙5a+2b﹚²
[(a+2b)-4a]2=(2b-3a)²
=﹙2b-3a﹚²
(a+2b)²-8a(a+2b)+16a²=[(a+2b)-2a]²=(2b-a)²