If α,β are the roots of ax²+bx+c=0 then (α/β – β/α)²=

α and β are the roots of the equation x²+px+p³=0,(p≠0).If the points (α,β) lies on the curve x=y²,then the roots of the given equation are

If the roots of x²+bx+c=0 are two consecutive integers then b²-4c=

A number consists of two digits whose product is 30.If the digits are interchanged the resulting numbers will exceed the previously by 9.The number is

If the roots of x²-2(5+2k)x+3(7+10k)=0 are equal then k=

The quadratic equations x² – 6xa = 0 and x² – cx + 6 = 0 and have one root in common. The other roots of the first and second equations are integers in the ratio 4 : 3. Then the common root is

3x-5x²+12 has maximum at x=

The cost of a cloth piece is Rs.35/-.If the length of the cloth piece is 4 metres more and each metre costs Rs.1/- less,the cost would remain unchanged.The length of the cloth piece is

If x²-y²+4x-6y+k is resolvable into two linear factors then k=

The expression x²-5x-6 is negative if x lies in