Question

1.
If one of the zeroes of the quadratic polynomial x2 + 3x +k is 2, then the value
of k is
10
fo) -10
B (€) -7
(d) -2​

Answer 1

Answer:

put x=2

$x {}^{2} + 3x + k = 0 \\ (2) {}^{2} + 3(2) + k = 0 \\ 4 + 6 + k = 0 \\ 10 + k = 0 \\ k = - 10$