RRB Group-D 11th Oct 2018-shift -1
Instructions
For the following questions answer them individually
Question 84
The zeros of the cubic polynomial $$2x^3 - x^2 - 2x + 1$$ are $$a, b$$ and $$c$$ respectively. Find $$ab + bc + ca$$ =?
Question 85
Which of the following statements is/are true?
A. Rigidity: According to the type of matter, shape differs, depending upon location of particles. Eg, solids have definite shape while liquids acquire the shape of their container and gases, as such, don't have any shape.
B. Compressibility: It is the property of matter to allow a decrease in volume under high pressure and gases show this property.
