Question

What is one root of this equation?

2x2 - 4x + 9 = 0

Answer 1

have you done factoring in your class, making that equation look like

(x )(2x ) = 0
?

Answer 2

or the use of the quadratic formula with
a = 1
b = -4
c = 9

Answer 3

@onemoretest Have you covered complex numbers?

Answer 4

i have done it, i just font remember the process. so i would plug one of those three numbers into this? (x )(2x ) = 0
and i don't remember doing that @mathmate

Answer 5

A failsafe method is just to use the quadratic formula

the
\[x = \frac{ -b +- \sqrt{b^2 - 4*a*c} }{ 2a }\]

Answer 6

If you have already covered complex numbers, then use the quadratic formula for
\(2x^2-4x+9\)
\(\huge x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\)
where a=2, b=-4 and c=9.
You will end up with an expression involving i.

Answer 7

thank you :) i got it

Answer 8

If you were referring to me or both, you're welcome!