Chọn câu sai
A . $left parenthesis x space minus 1 space right parenthesis cubed space plus space 2 left parenthesis x space minus 1 right parenthesis squared$ = $left parenthesis x minus 1 right parenthesis squared space left parenthesis x space plus 1 right parenthesis$
B . $left parenthesis x space minus 1 right parenthesis cubed space plus space 2 left parenthesis x space minus 1 right parenthesis$ = $left parenthesis x minus 1 space right parenthesis space open square brackets left parenthesis x minus 1 right parenthesis to the power of 2 space end exponent plus 2 space close square brackets$
C . $left parenthesis x space minus 1 space right parenthesis cubed space plus space 2 left parenthesis x space minus 1 right parenthesis squared$ = $left parenthesis x minus 1 space right parenthesis space open square brackets left parenthesis x minus 1 right parenthesis to the power of 2 space end exponent plus 2 x minus 2 space close square brackets$
D . $left parenthesis x space minus 1 space right parenthesis cubed space plus space 2 left parenthesis x space minus 1 right parenthesis squared$ = $left parenthesis x minus 1 right parenthesis space left parenthesis x space plus 3 right parenthesis$

Có bao nhiêu giá trị x thỏa mãn 5(2x – 5) = x(2x – 5) A. 1 B. 2 C. 3 D. 0

Giải thích

Lời giải Ta có: Đáp án cần chọn là: B. 2

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