Toán Lớp 7: a) 2.3 mũ x = 162 b) 5.x mũ 3 = 40 c) (x+2) mũ 3 = -27 d) (2x -1) ) mũ 2 = 25 ê) (x+1/2)mũ 2 = 25/4
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