Question

x^2+3=-4x
how do u dolve this with the quadratic formula? Ive tryed 4 hours and keep geting the wrong answer...

Answer 1

put all terms on one side (the left one for example), and use the formula involving the discriminant \(\Delta\): the solutions are given by the formula \(-\frac{-b\pm\sqrt\Delta}{2a}\) (if the equation is \(ax^2+bx+c=0\))

Answer 2

Whats the discriminant?

Answer 3

it's the quantity noted \(\Delta\) , the value is \(b^2-4ac\).

Answer 4

the correct fraction is \(\frac{-b\pm\sqrt{\Delta}}{2a}\) (i put a minus sign in the first message that shouldn't be there)

Answer 5

Im gettting a triangle under that √, id that right?

Answer 6

yes. what is your \(\Delta\) ? if it's correct then you will most likely find the two solutions.

Answer 7

i don't know really what you did..

write \(x^2+3=-4x\) as \(x^2+4x+3=0\) and recognize the values of \(a,b,c\).
Here \(a=1,b=4,c=3\).

Answer 8

ok. I didnt pout abc in that order, one sec

Answer 9

*put

Answer 10

4^2-4(1)(3)
right so far?

Answer 11

yes.

Answer 12

3 and 1?

Answer 13

-1 and -3. i think. please check.

Answer 14

ur right

Answer 15

yup, then you got the answer.