Question

3x²+x+4=0
Help Please !

Answer 1

By using the quadratic formula, you will be able to find x.

Answer 2

\(\large \frac{-b \pm \sqrt{b^2 -4ac}}{2a}\)

Answer 3

it has no roots

Answer 4

In this case,
a = 3
b = 1
c = 4

Plug it in the formula

\(\huge \frac{-(1) \pm \sqrt{(1)^2-4(3)(4)}}{2(3)}\)
Then you'll find out that the discriminant is a negative, hence it has no roots; it also means that the parabola doesn't lay on the x-axis.

Answer 5

you will end up with 1/12 (-i+sqrt(47)-6 i x) (i+sqrt(47)+6 i x) as your factored form

Answer 6

\[1/12 (-i+\sqrt(47)-6 i x) (i+\sqrt(47)+6 i x)\]

Answer 7

how did yu get that ?

Answer 8

using the quadratic formula just like zepp said you get a negative under the radical

Answer 9

ooh i get it ! thanks so much

Answer 10

to you both !

Answer 11

if you look at the graph, notice that the function does not cross the x axis
you will have 2 complex solutions
when you use the quadratic formula, there will be a negative number under the square root sign

Answer 12

\[\Delta = b^2 - 4 a c= 1^2 - 4(3)c= -47 = i^2 47\\
\sqrt \Delta = \pm i \sqrt {47}\\
x= \frac { -1 \pm i \sqrt {47}} { 6}
\]