If the quadratic coefficient of X in the product of [x & sup2; - MX + 1] [X-2] is zero, then the value of M is [] Good play + 20

If the quadratic coefficient of X in the product of [x & sup2; - MX + 1] [X-2] is zero, then the value of M is [] Good play + 20

Then the value of M is [- 2]

If the quadratic coefficient of X in the product of (x2-mx + 1) (X-2) is zero, then the value of M is ()
A. 1B. -1C. -2D. 2

∵ (x2-mx + 1) (X-2) = X3 - (M + 2) x2 + (2m + 1) X-2, and the quadratic coefficient of X in the product is zero, ∵ m + 2 = 0, ∵ M = - 2

Given that the coefficient of quadratic term in the product of (X-2) (x2 MX + 1) is zero, then M=______ .

Quadratic term = - 2x ^ 2-mx ^ 2 = - (M + 2) x ^ 2
So: M + 2 = 0
m=-2