Algebra-1
Card Set Information
Author:
Anonymous
ID:
283278
Filename:
Algebra-1
Updated:
2014-09-17 01:33:03
Tags:
algebra
Folders:
algebra
Description:
algebra set -1
Show Answers:
if in equation Ax^2+Bx+c=0
A=C, then?
two roots α and β are reciprocal to each other
if in equation Ax^2+Bx+C=0,
B=0
two roots α and β are equal in magnitude and oposite in sign
in equation x
^{2}
+5x+6=0
the sign of two roots α and β is ???
sign of (α and β)= -ve
sign of (αβ)= +ve
both roots α and β are negative
in equation x
^{2}
-5x+6=0
the sign of two roots α and β is ???
sign of (α and β)= +ve
sign of (αβ)= +ve
so,both roots α and β are positive
in equation x
^{2}
-5x-6=0
the sign of two roots α and β is ???
sign of (α and β)= +ve
sign of (αβ)= -ve
then, α is positive and β is negative if α>β(numerically)
in equation x
^{2}
+5x-6=0
the sign of two roots α and β is ???
sign of (α and β)= -ve
sign of (αβ)= +ve
then, α is negative and β is positive
if, α>β(numerically)
roots of an equation is given by
x=(-b±√D)÷2a