0.8X(2.3-1.17)X1.25X(3.27+0.73)
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0.8X(2.3-1.17)X1.25X(3.27+0.73)
0.8X(2.3-1.17)X1.25X(3.27+0.73)
0.8X(2.3-1.17)X1.25X(3.27+0.73)
0.8*(2.3-1.17)*1.25*(3.27+0.73)
=(2.3-1.17)*(3.27+0.73)
=1.13*4
=4.52
0.8*(2.3-1.17)*1.25*(3.27+0.73)
=(2.3-1.17)*(3.27+0.73)
=1.13*4
=4.52
0.8X(2.3-1.17)X1.25X(3.27+0.73)
0.8x(2.3-1.17)x1.25x(3.27+0.73)的巧算方法
(-8/25)x1.25x(-8) 计算
(-8/25)x1.25x(-8)计算
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疑难数学问题火急求助x1^3-3x1^2+2x1+x2→x1(x1^2-2x1+2-x1)+x2→x1(3-x1)+x2 (怎么算出3-X1的)→3x1-x1^2+x2=2x1-x^2+x1+x2=-(x^2-2x1)+x1+x2=-1+2=1
求几道一元二次方程的过程(11)x^2+15x-54=0 x1=-18 x2=3 (12)x^2+11x+18=0 x1=-2 x2=-9 (13)x^2-9x+20=0 x1=4 x2=5 (14)x^2+19x+90=0 x1=-10 x2=-9 (15)x^2-25x+156=0 x1=13 x2=12 (16)x^2-22x+57=0 x1=3 x2=19 (17)x^2-5x-176=0 x1=16 x2=-11 (18)x^2-26x+
解方程(25-20)x1.5%x+x=1075