X2 + 10X - 11 = 0
What two factors of - 11 add up to 10 ?
(X - 1)(X + 11)
==========
X = 1
X = - 11
x = -½
Using the discriminant of b^2 -4ac = 0 the value of k works out as -2
That factors to (x - 2)(x + 7)
It can not be factored because its discriminant is less than zero
That factors to (x - 2)(x + 4) x = 2, -4
It is: 3x2+6x-11 = 0
63828
It is a quadratic equation.
True. Both equations can be factored to x(x+4)=0 and 3x(x+4)=0, respectively. Therefore, the solutions for both equations are x=0 and x=-4. So, yes, the solutions are identical because math doesn't play favorites.
x = -½
4
It is a quadratic equation in the variable x.
If you mean: x2+9x+20 then it is (x+4)(x+5) = 0 when factored
4, -5
3x(2x + 1)
(x + 3)(x + 2)
(2x-4)(x-1) = 0