Question

i. If one zero of the quadratic polynomial x2 + 3x + k is 2, then the value of k is
a. 10
b.-10
C. 5
d. -5
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Answer 1

Answer:

$f(2) = (2) {}^{2} + 3(2) + k = 0 \\ or \: 10 + k = 0 \\ or \: k = - 10$

Answer 2

Answer:

b) -10

Step-by-step explanation:

Given, one zero is 2.

so put x = 2

=> 2² + 3×2 +k = 0

=>4+6+k = 0

=> 10+ k = 0

=> k = -10