The quadratic coefficients of equation 3x (x-1) = 2 (x + 2) + 8 are The coefficient of the first term is, and the constant term is 2) If x = - 1 / 2 is a root of the equation KX ^ 2-x-2 = 0, then K=_______ 3) If the quadratic equation of one variable x ^ 2-6x-5 = 0 is changed into the form of (x + a) ^ 2 = B, then B=_____________ 4) Write a quadratic equation of one variable with x = 3 as a root and the coefficient of quadratic term is 1_____

The quadratic coefficients of equation 3x (x-1) = 2 (x + 2) + 8 are The coefficient of the first term is, and the constant term is 2) If x = - 1 / 2 is a root of the equation KX ^ 2-x-2 = 0, then K=_______ 3) If the quadratic equation of one variable x ^ 2-6x-5 = 0 is changed into the form of (x + a) ^ 2 = B, then B=_____________ 4) Write a quadratic equation of one variable with x = 3 as a root and the coefficient of quadratic term is 1_____

1) The coefficient of quadratic term is 3, the coefficient of primary term is - 5, and the constant term is - 12
It is reduced to 3x ^ 2-5x-12
So the coefficient of quadratic term is 3, the coefficient of primary term is - 5, and the constant term is - 12
2）k=6
Take x = - 1 / 2 into the equation to get (1 / 4) K + (1 / 2) - 2 = 0
The solution is k = 6
3）b=14
The formula is (x-3) ^ 2-14 = 0
That is, (x-3) ^ 2 = 14
So B = 14
4)x^2-4x+3
As long as the factor contains x-3
Such as (x-3) * (x-1) = 0
That is x ^ 2-4x + 3