Q9 of 168 Page 7

Find the zeroes of the quadratic polynomial:

4x2 — x — 5

Equating the expression with 0,


4x2 — x — 5 = 0


On factorising it further,


4x2 + 4x - 5x - 5 = 0


4x(x + 1) -5(x + 1)=0


(4x - 5) (x + 1) = 0


x = or x = -1


The zeroes of 4x2 — x — 5 are and -1.


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