Question

1
Find the zero of polynomial 2x²+ 7x-4 is​

Answer 1

Step-by-step explanation:

$2 {x}^{2} + 7x - 4 = 0 \\ 2 {x}^{2} - x + 8x - 4 = 0 \\ x(2x - 1) +4(2x - 1) = 0 \\ (2x - 1)(x + 4) = 0 \\ 2x - 1 = 0 \: \: \: \: \: (or) \: \: \: \: \: x + 4 = 0 \\ 2x = 1 \: \: \: \: \: (or) \: \: \: x = 4 \\ x = \frac{1}{2} \: \: \: (or) \: \: x = 4$