Question

Use the quadratic formula to solve. If needed , round to the nearest hundredth
x^2 +3=-4x

Answer 1

Hi there :)
Welcome to openstudy!
Put the equation into standered form first
\[\huge~\rm~\bf~ax^2+bx+c=0\]

Answer 2

How would we make x^2 +3=-4x equal to 0 ? Any ideas?

Answer 3

let me try ... ummm
\[x^2+3x+0+-4x?\]

Answer 4

wow that awnser looks so dumb :( sorry..

Answer 5

Nope not quite....and we are all here to learn no worries :D
x^2 +3=-4x
Add 4x to both sides what do we get?

Answer 6

\[4x+x^2+3=0\]

Answer 7

right?

Answer 8

Almost! :)
You have it just in the wrong order.
\[\huge~\rm~\bf~x^2+4x+3=0 \]
\[\huge~\rm~\bf~ax^2+bx+c=0\]
What are the abc values?
a=?
b=?
c=?
Hint: Use the standered form to help you figure it out :)

Answer 9

im drawling a blank right now

Answer 10

do u mind if i add you onto a website that its a white board where you can show me??
sorry im more visual ..

Answer 11

go here @pooja195 https://www.twiddla.com/2486992

Answer 12

\(\bbox[8pt, #99ff99,border:1px solid black]{\Large \Large{x=~} \huge{ \frac{-\color{magenta}{b} \pm\sqrt{ \color{magenta}{b} ^2-4 \color{blue}{a} \color{red}{c}}}{2 \color{blue}{a}} } ~ }\)

when the equation is \(\Large\color{black}{ \color{blue}{a} x^2+ \color{magenta}{b}x+ \color{red}{c}=0 }\).
\(\Large\color{black}{ \color{blue}{1} x^2+ \color{magenta}{4}x+ \color{red}{3}=0 }\).

Answer 13

okay so then ...you have to sub the 3?

Answer 14

im sorry im homeschooled and my teacher doesnt do live lessons to show us how to do anything

Answer 15

I see.
\(\bbox[8pt, #99ff99,border:1px solid black]{\Large \Large{x=~} \huge{ \frac{-\color{magenta}{4} \pm\sqrt{ \color{magenta}{4} ^2-4 \color{blue}{(1)} \color{red}{(3)}}}{2 \color{blue}{(1)}} } ~ }\)

when the equation is \(\Large\color{black}{ \color{blue}{a} x^2+ \color{magenta}{b}x+ \color{red}{c}=0 }\).
\(\Large\color{black}{ \color{blue}{1} x^2+ \color{magenta}{4}x+ \color{red}{3}=0 }\).

Answer 16

^it's all color coordianted

Answer 17

Solve what's in the square root first
\[\huge~\rm~\bf~4^2 -4(1)(3)\]
DO NOT SQUARE ROOT THIS

Answer 18

-4 x 1 = 4
-4 x 3 = -12

Answer 19

come onto the link you sent me :)

Answer 20

ok