A. (x – 4)(x – 2)
B. (x – 4)(x + 2)
C. (x + 4)(x – 2)
D. (x – 4)(2 – x)
A. (x – 5)(x + 2)
B. (x – 5)(x - 2)
C. (x + 5)(x + 2)
D. (x – 5)(2 – x)
A. (5 + a – b)(5 – a – b)
B. (5 + a + b)(5 – a – b)
C. (5 + a + b)(5 – a + b)
D. (5 + a – b)(5 – a + b)
A. (m – 1)(n2 – n + 1) (n + 1)
B. n2(n + 1)(m – 1)
C. (m + 1)(n2 + 1)
D. (n3 + 1)(m – 1)
A. (x2 + 16)2 – (4x)2
B. (x2 + 8)2 – (16x)2
C. (x2 + 8)2 – (4x)2
D. (x2 + 4)2 – (4x)2
A. (x4 - 2)2 – (2x2)2
B. (x4 + 4)2 – (4x2)2
C. (x4 + 2)2 – (4x2)2
D. (x4 + 2)2 – (2x2)2
A. 2x + y + 1
B. 2x – y + 1
C. 2x – y
D. 2x + y
A. x + 5y
B. x – 5y
C. 5y – x
D. 5y + 2x
A. 3x2 – 5x – 2 = (x – 2)(3x + 1)
B. x2 + 5x + 4 = (x + 4)(x + 1)
C. x2 – 9x + 8 = (x – 8)(x + 1)
D. x2 + x – 6 = (x – 2)(x + 3)
A. x3 + x2 – 4x – 4 = (x – 2)(x + 2)(x + 1)
B. x2 + 10x + 24 = (x + 4)(x + 6)
C. Cả A, B đều sai
D. Cả A, B đều đúng
A. x4 + 4x2 – 5 = (x2 + 5)(x – 1)(x + 1)
B. x2 + 5x + 4 = (x2 – 5)(x – 1)(x + 1)
C. x2 – 9x + 8 = (x2 + 5)(x2 + 1)
D. x2 + x – 6 = (x2 – 5)(x + 1)
A. 16x3 – 54y3 = 2(2x – 3y)(4x2 + 6xy + 9y2)
B. x2 – 9 + (2x + 7)(3 – x) = (x – 3)(-x – 4)
C. x4 – 4x3 + 4x2 = x2(x – 2)2
D. 4x3 – 4x2 – x + 1 = (2x – 1)(2x + 1)(x + 1)
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