Toán Lớp 8: (X^2 + 2) (x -5) – (x-2)^3 = -2
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Toán Lớp 8: (X^2 + 2) (x -5) – (x-2)^3 = -2
Comments ( 2 )
<=>x^3-5x^2+2x-10-x^3+6x^2-12x+8=-2
<=>x^2-10x-2=-2
<=>x^2-10x-2+2=0
<=>x^2-10x=0
<=>x(x-10)=0
<=>\(\left[ \begin{array}{l}x=0\\x-10=0\end{array} \right.\)<=>\(\left[ \begin{array}{l}x=0\\x=10\end{array} \right.\)
Vậy : Phương trình có tập nghiệm S={0; 10}