CBSE Class 10 Answered
What is the number of integral values of "k" for which the equation has two rational solutions.
Asked by | 02 Apr, 2008, 12:05: PM
Expert Answer
Dear Student,
For the given quadratic equation 2x2 + kx -4 = 0 will have rational solution if the Discriminant D = √b2 – 4ac should be an integer i.e b2 – 4ac should be a perfect square.i.e k2 -4*2*(-4) = k2 + 32 ,so for k = +2 and -2 the expression will have two rational solution therefore k can take two integral values.
Answered by | 07 Jul, 2008, 09:10: PM
CBSE 10 - Maths
Asked by hanugraha | 30 May, 2010, 07:53: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by hanugraha | 30 May, 2010, 07:13: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by shobhitdc | 29 May, 2010, 04:59: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by ROJAAPPA | 29 May, 2010, 12:58: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by shobhitdc | 29 May, 2010, 10:52: AM
ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by devanshmudgal | 28 May, 2010, 07:31: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by shobhitdc | 28 May, 2010, 01:12: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by shobhitdc | 28 May, 2010, 01:08: PM
ANSWERED BY EXPERT