If x2 + ax + 4 is the result of a binomial square of X, then a=_____

If x2 + ax + 4 is the result of a binomial square of X, then a=_____

If X & # 178; + ax + 4 is the result of a binomial square of X,
Then x & # 178; + ax + 4 = (x ± 2) &# 178;, that is, X & # 178; + ax + 4 = x & # 178; ± 4A + 4, so a = ± 4

The square of a quadratic trinomial x + 2x + a multiplies it by a binomial x + B. if there is no quadratic term in the product and the coefficient of the quadratic term is 1, find the value of a and B

(x²+2x+a)(x+b)
=x³+(2+b)x²+(2b+a)x+ab
There is no linear term in the product, and the coefficient of quadratic term is 1,
Then, 2b + a = 0 and 2 + B = 1
The solution is a = 2, B = - 1

A polynomial which multiplies a binomial with X by x ^ 2 + X + 1 does not contain a binomial

Please describe the title again. Isn't it right?

"5.89 × 0.5 × 4 × 0.5" is calculated by a simple method

5.89×0.5×4×0.5
=5.89×(0.5×4×0.5)
=5.89x1
=5.89

Lim the limit of x ^ A-M ^ A / x ^ B-M ^ B (A.B constant) when x tends to M

lim[x→m] (x^a-m^a)/(x^b-m^b)
Law of lobida
=lim[x→m] [ax^(a-1)]/[bx^(b-1)]
=(a/b)m^(a-b)
If you don't understand, please ask. If you can solve the problem, please click "select as satisfactory answer" below

(1) The expanded polynomial (MX + 8) (2-3x) does not contain x term, and the value of M is obtained
(2) Try to explain that the value of algebraic formula (2x + 3) (6x + 2) - 6x (2x + 13) + 8 (7x + 2) has nothing to do with the value of X

（mx+8）（2-3x）
=2mx-3mx²+16-24x
=-3mx²+(2m-24)x+16
∵ does not contain x items
∴2m-24=0
∴m=12
（2x+3）（6x+2）-6x（2x+13）+8（7x+2）
=12x²+22x+6-12x²-78x+56x+16
=22
The result has nothing to do with the value of X

50 times 5 out of 17 + 6 out of 17

50 × 5/17 + 6/17
=(51 × 5 / 17 - 5 / 17) + 6 / 17, add 5 / 17 to the first equation and subtract 5 / 17, the value remains unchanged
=3×5 + 1/17
=15 and 1 / 17

The general solution of Y '= LNX differential equation is

y=∫lnxdx
=xlnx-∫xdlnx
=xlnx-∫xdlnx
=xlnx-x+C

The two roots of the equation x square + ax + 2 = 0 are less than - 1 to find the value range of real number a

To make both of the equations x ^ 2 + ax + 2 = 0 less than - 1,
So the discriminant = a ^ 2-4 * 2 > 0,
Axis of symmetry x = - A / 20,
So two roots two

5.4 divide 36 by vertical calculation