Toán Lớp 8: (x-3)(x^2+3x+9)+x^2(2-x) helpp me
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Toán Lớp 8: (x-3)(x^2+3x+9)+x^2(2-x) helpp me
Comments ( 2 )
=(x^3+3x^2+9x-3x^2-9x+27)+2x^2-x^3
=2x^-27