Q14 of 274 Page 91

One of the zeroes of the polynomial 2x2 + 7x – 4 is

Let f(x) = 2x2 + 7x – 4

= 2x2 + 8x – x – 4


= 2x (x + 4) – 1 (x + 4)


= (2x – 1) (x + 4)


So, 2x – 1 = 0


2x = 1


x =


And, x + 4 = 0


x = - 4


Thus, one of zero of the given polynomial is


Hence, option B is correct

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