If you mean b^2 -4ac then it is the discriminant of a quadratic equation. If the discriminant equals 0 then the equation has 2 equal roots. If the discriminant is greater than 0 then the equation has 2 different roots. If the discriminant is less than 0 then it has no real roots.
Using the discriminant the possible values of k are -9 or 9
Using the discriminant of b^2 -4ac = 0 the value of k works out as -2
for something to be an equation it has to be equal to something.2x+3=0 would be a linear equation (with x=-1.5) 2x+3+0 is just a series of terms.
You can do the equation Y 2x plus 3 on a graph. On this graph the Y would equal 5 and X would equal to 0.
If the discriminant of a quadratic equal is zero then it will have two equal roots.
That is not an equation, since it doesn't have an equal sign.
It has no roots because the discriminant of the given quadratic equation is less than zero.
If you mean b^2 -4ac then it is the discriminant of a quadratic equation. If the discriminant equals 0 then the equation has 2 equal roots. If the discriminant is greater than 0 then the equation has 2 different roots. If the discriminant is less than 0 then it has no real roots.
You don't have an equation there.
This quadratic equation has no real roots because its discriminant is less than zero.
Using the discriminant the possible values of k are -9 or 9
Using the discriminant formula for a quadratic equation k has a value of 8/25 or maybe 0.
The roots are: x = -5 and x = -9
You can find the roots with the quadratic equation (a = 1, b = 3, c = -5).
If it was expressed as a quadratic equation it would have no roots because the discriminant is less than zero
x2-4x+4 = 0 (x-2)(x-2) = 0 x = 2 or x = 2 It has two equal roots.