1,2x.4, 4x² 8xy-6y, (1) -12 (2)-16, -2n³ 2n², 3, 2, (1)7,49 (2)5,16 (3) 2,2 (4) 4,5,14, 3, 80, 5, (1) -1 (2) -6, 1, 2, 4,2,6분의5,y=-2분의1x 90,3,7x²-3x-6, a=b-4분의 s 4, 55쪽 : t = v분의 x 650 56~59 : 1,4,21,2개,5,2,0.3(3위에 점),3,13(정답 두개),3,5,a=4 b=8, 4, 1,5,5. 2분의 3배, x-2y, -3x² 9x-5
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