book Maths Puzzle Numerical Ability

a) What is the sum of the roots of the equation ax2(squared)+ bx + c = 0?
b) What is the product of its roots?

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(1)

Find the LCM
4y^2-25; 2y^2+9y+10; 2y^2-y-10
the difference of the squares of two consecutiveodd integersis 48.find the integers