Question

Solve 3x^2-5x-7=0
What are the solutions?
x=

Answer 1

Do you know the quadratic formula?

Answer 2

A little

Answer 3

do you know x=\[(-b+-\sqrt{b^2-4ac})/2a\]

Answer 4

this is the quadratic formula

Answer 5

yeah, but to me it is confusing

Answer 6

it is a formula for ax^2+bx+c=0.. ok?

Answer 7

ok

Answer 8

now you compare the terms of your equation with it. to get a,b and c

Answer 9

a=3,b=-5,c=-7

Answer 10

now just subsitute in the formula..

Answer 11

how do you find out what a, b, and c are?

Answer 12

ok

Answer 13

and what do I do with x?

Answer 14

see ax^2+bx+c=0
......3x^2-5x-7=0.. compare the two

Answer 15

a=3 b=-5 c=-7

Answer 16

oops I see what you mean about a b and c.

Answer 17

lol.. so you get it now? Now simply subsitute it in the formula.:)

Answer 18

I believe so. I hope so

Answer 19

you can view this for final answer and the graph..
http://www.wolframalpha.com/input/?i=3x^2-5x-7%3D0++

Answer 20

Hope it helps.. if you any more doubt feel free to ask:)
n dun forget my medal..lol

Answer 21

thank you