Question

Use the quadratic formula to find the roots of the equation. x^2 + 3x - 18 =0 ... i tried using formula and couldnt get it.

Answer 1

let me see what you did with the formula..

Answer 2

how do you use draw option

Answer 3

you click and draw! no eraser tho ;_;

Answer 4

well i plugged all the numbers in and i guess i messed somethin up

Answer 5

just show me your substitution

Answer 6

x= -3 + (radical) 3^2 - 4 (1) (-18)
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2 (1)

Answer 7

hmm i see nothing wrong there

Answer 8

but the answer didnt come out right

Answer 9

its a multilpe choice also

Answer 10

\[x = \frac{-3 \pm \sqrt{3^2 - 4(-18)}}{2}\]
\[x = \frac{ -3 \pm \sqrt{9 +72}}{2}\]
\[x = \frac{-3 \pm \sqrt{81}}{2}\]
do you see it now?

Answer 11

ohhh i c what idid wrong...

Answer 12

thanks

Answer 13

<tips hat>

Answer 14

<steal hat>