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If the result of (a + m) (a + 12) does not contain the linear term of a, then the value of M is () A. 2B. -2C. 12D. -12
∵ (a + m) (a + 12) = A2 + (M + 12) a + 12 · m, and ∵ does not contain a linear term about the letter A, ∵ m + 12 = 0, ∵ M = - 12
If the result of (x-m) (x + 4) does not contain the first term of the letter X, then M=
(x-m)(x+4)=x²+(4-m)x-4m
The first term without the letter X
Then 4-m = 0, M = 4
If the result of (a + m) (a + 12) does not contain the linear term of a, then the value of M is ()
A. 2B. -2C. 12D. -12
∵ (a + m) (a + 12) = A2 + (M + 12) a + 12 · m, and ∵ does not contain a linear term about the letter A, ∵ m + 12 = 0, ∵ M = - 12
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