Q. 9 A5.0( 3 Votes )

# Find the zeroes of the quadratic polynomial:2x2 + x — 1

Equating the expression with 0,

2x2 +x -1 = 0

On factorising it further,

2x2 -x + 2x - 1 = 0

x(2x - 1) +1(2x - 1) = 0

(2x - 1) (x + 1) = 0

x = or x = -1

The zeroes of 2x2 + x — 1 are and -1.

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