Question

If the Discriminant of an equation is negative, which of the following is true of the equation

Answer 1

if this is quadratic then

discriminant >0 then two real roots
discriminnt = 0 1 real root
discriminant < 0 complex roots

Answer 2

which two values of x are roots of the polynomial below x^2 + 5x + 9

Answer 3

you can do this in two ways
1) Sick it into the quadratic formula.\[x= (-b \pm \sqrt{b ^{2} - 4a2}) \div 2a\]
2) try to factorise where you wor out all the factors of nine and the two that add to +5 is the anwer

Answer 4

Ill show you

Answer 5

\[(-5+\sqrt{-11})\div2 \] \[(-5-\sqrt{-11})\div2 \]
because 5^2 - 4x1x9 is negative so it has no real roots

Answer 6

hmm the quadratic eqn is wrong should be :\[(-b \pm \sqrt{b^2-4 \times a \times c})\div 2 \times a\]