Question

28. The number of zeros of x² + 4x + 2
(a) 1
(b) 2
(c) 3
(d) none of these​

Answer 1

Answer:

(b) 2

Step-by-step explanation:

$x {}^{2} + 4x + 2 = 0\\ x {}^{2} + 2x + 2x + 2 = 0\\ x(x + 2) + 1(x + 2) = 0\\ ( x + 1)( x + 2) = 0$

Therefore x = – 1 or – 2