Question

use the quadratic formula to solve the equation x^2+3=-4x

Answer 1

okay first bring everything to one side so your equation = 0

Answer 2

now do you know what the quadratic formula is?

Answer 3

no

Answer 4

http://schooltutoring.com/help/wp-content/uploads/2012/06/quadratic-equation-calculator.gif

Answer 5

this is it. now bring everything to the left in your equation

Answer 6

I don't understand how

Answer 7

okay, this is your equation --> x^2+3=-4x now im going to bring everything to the left --->\[x^2+4x+3=0\]

Answer 8

Okay, now what?

Answer 9

now this is the general formula for a quadratic ax^2+bx+c so now what from your equation is a, b and c?

Answer 10

I have no clue

Answer 11

okay here ill give you an example in this equation 2x^2 + 3x + 5
a=2
b=3
and c=5

in this equation 6x^2+9x+12
a=6
b=9
and c=12

Answer 12

so for x^2+4x+3 what is a, b and c?

Answer 13

a=2 b=4 c=3?

Answer 14

b and c are right but a=1 remember x^2 is really 1x^2. and its general formula is ax^2 so a=1

Answer 15

but yes a=1 b=4 and c=3
now just sub these into the quadratic equation that I gave you above

Answer 16

k hold on i'll try

Answer 17

sure, you shpuld get two answers

Answer 18

what does the plus sigh with the line under it mean?

Answer 19

lol because you have to get two answers for x (as it is a parabola and will intersect at the x axis in two place)s there are actually two quadratic equations

Answer 20

http://1.bp.blogspot.com/_1-QGTvcr_Ao/TQR2I3wvruI/AAAAAAAAABk/J2reKuLyFHw/s1600/Quadratic_Formula.jpg

Answer 21

one is -b + so on and the other is -b - something

Answer 22

okay

Answer 23

so what are your answers that you get?

Answer 24

1 and 3

Answer 25

its actually -1 and -3

Answer 26

oh oops. Thank you

Answer 27

no problem, glad to help!