(18:06:27) Sharpie: i need some math help
(18:06:32) Sharpie: i have the following equation
(18:06:34) Sharpie: x=4+3
(18:06:37) Sharpie: look what i did:
(18:06:38) Sharpie: x-4=3
(18:06:42) Sharpie: (x-4)^2=9
(18:06:46) Sharpie: x^2-8x+16=9
(18:06:50) Sharpie: x^2-8x+7=0
(18:06:56) Sharpie: solved the equation and i got:
(18:07:01) Sharpie: x=1 / x=7
(18:07:05) Sharpie: how do i know which one is right?
(18:10:41) nForce: a polynomial of degree n has n solutions
(18:11:00) nForce: in other words since its a quadratic equation its only normal that you will come up with two solutions
(18:11:03) Sharpie: so you're saying, for x = 3+4, there's more than 1 solution?
(18:11:24) nForce: one second
(18:11:27) nForce: let me look above
(18:12:39) nForce: thats because the equations aren't the same because of the squaring
(18:12:51) Sharpie: so how do i know which one is right?
(18:13:51) nForce: they both are for the second equation but its not the same as the original
(18:14:04) nForce: because of the squaring you did
(18:14:25) Sharpie: so how do i know which one is right FOR THE FIRST EQUATION?
(18:14:50) nForce: FOR THE FIRST EQUATION CLEARLY THERE IS ONLY ONE SOLUTION
(18:15:00) Sharpie: THATS RIGHT SO HOW DO I KNOW WHICH ONE IS CORRECT?
(18:15:42) nForce: well if you take
(18:15:55) nForce: x = 4 + 3 than x = 7
(18:16:00) nForce: but then after the operations you performed
(18:16:09) nForce: the equation isn't the same anymore
(18:16:21) Sharpie: so how do i know 1 isn't correct?
(18:16:32) nForce: because if you plug in 1 for x
(18:16:35) nForce: does 1 = 7
(18:16:35) nForce: no
(18:16:41) Sharpie: well
(18:16:47) Sharpie: 1*0 = 7*0 / :0
(18:16:48) Sharpie: 1=7
(18:16:54) nForce: lol
(18:16:59) nForce: come on dont ask stupid questions like this
(18:17:05) Sharpie: i'm bored