book Maths Puzzle Numerical Ability

p(x)=3x^3-10x^2-5x+2 has three real roots one of them is -2/3 the others are ____ and ____

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book Other Question

What is the perimeter of a rhombus-shaped highway sign with a 20-centimeter side?

a-40 centimeters
b-80 centimeters
c-400 centimeters
d-20 centimeters
A dormitory now houses 30 men and allows 42 square feet of space per man. If five more men are put into this dormitory, how much less space will each man have?