|x+1010|+|x+504|+|x+472|+|x-1008|
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x*x(x+1)*(x+2)=504 x(x+1)( x+2)= 504 x(x+1)(x+2)=504 x(x+1)(x+2)=7×8×9 x1=7 ,x^3+3x^2+2x-504=0, x^3-7x^2+10x^2-70x+72x-504=0 (x-7)(x^2+10x+72)=0 x1=7, x2=-5+i根号(47),x3==-5-ii根号(47)
咨询记录 · 回答于2021-11-14
|x+1010|+|x+504|+|x+472|+|x-1008|
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x*x(x+1)*(x+2)=504 x(x+1)( x+2)= 504 x(x+1)(x+2)=504 x(x+1)(x+2)=7×8×9 x1=7 ,x^3+3x^2+2x-504=0, x^3-7x^2+10x^2-70x+72x-504=0 (x-7)(x^2+10x+72)=0 x1=7, x2=-5+i根号(47),x3==-5-ii根号(47)