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

Question

Philoid · Accepted Answer

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