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
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  1. if in equation Ax^2+Bx+c=0
    A=C, then?
    two roots α and β are reciprocal to each other
  2. if in equation Ax^2+Bx+C=0,
    B=0
    two roots α and β are equal in magnitude and oposite in sign
  3. in equation x2+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
  4. in equation x2-5x+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
  5. in equation x2-5x-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)
  6. in equation x2+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)
  7. roots of an equation is given by
    x=(-b±√D)÷2a

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