exam Maths Puzzle Numerical Ability

If the product of the roots of a quadratic equation is -1/4 and the sum of the roots of the same quadratic equation is 5/2, the equation may be

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exam Other Question

(-32a^10)^3/5

a^1/2(a3/2-2a^1/2)

a^4-c^4/(a+c)^2(a^2+c^2)

3-5m-2m^2/2m^2+7m+3
Factor completely.
b^2 - ab - 6a^2
I got this answer this time is it right?
(b - 6a)(b + a)