Question

general question!

Answer 1

can i know what does \[b ^{2}-4ac\] actually mean ? how does it affect the the position of the graph ? (as i have memorise the position by positive or negative

Answer 2

yes it can be effect the graph by negative numbers

Answer 3

i know its called discriminent if im not wrong..

Answer 4

it determines the kind of roots a quadratic has

Answer 5

It's the discriminate of quadratics, it tells you how many solutions your function is going to have. Whether it touches the x-axis or not. If it doesn't, then you'll have no solutions.

Answer 6

if D=0, it has one root
if D <0 it has complex root and doesnt have any x intercepts
if D > 0 it has to distinct real roots

Answer 7

so it will only have solutions if it touches the x-axis ?

Answer 8

'real' solutions

Answer 9

x^2 + 4 = 0 has a solution, but not any 'real' solution

Answer 10

Yes, "real" solutions, if it doesn't you'll have complex, or imaginary

Answer 11

Btw it's \(\ \sf \sqrt{b^2 -4ac} \) ^_^

Answer 12

no.. it just show \[b ^{2}-4ac\] there is no square root

Answer 13

so its like \[b ^{2}-4ac <0, b ^{2}-4ac = 0, b ^{2}-4ac >0\]

Answer 14

b^2-4ac=0 then the roots are real and equal
b^2-4ac greater than 0 then roots are real and not equal
b^2-4ac less than 0 then roots are complex and real
b^2-4ac is the perfect square then roots are rational and not equal

Answer 15

erm.. where do you determine the roots from ?

Answer 16

have u got it @HatcrewS ?
http://staff.argyll.epsb.ca/jreed/math20p/quadraticFunctions/quadraticFormula.htm

Answer 17

it is written in my math book

Answer 18

ok i got it! thanks you very much! :D

Answer 19

not say thank u
just help three persons anywhere and say to them that help more three persons any where .okay
:)