Question
Question: If the quadratic equations, 3x<sup>2</sup> + ax + 1 = 0 and 2x<sup>2</sup> + bx + 1 = 0 have a comm...
If the quadratic equations, 3x2 + ax + 1 = 0 and
2x2 + bx + 1 = 0 have a common root, then the value of the
expression 5ab –2a2 –3b2 is:
A
0
B
1
C
–1
D
None of these
Answer
1
Explanation
Solution
Condition for common root
(3 –2)2 = (3b –2a) (a –b)
1 = 5ab –2a2 –3b2