Question

lf one zero of the quadratic polynomial x*+3x+b is 2 , then the value of b is ​

Answer 1

Answer:b=-6

Step-by-step explanation:(2)+3×(2)+b=2

2+6+b=2

8+b=2

b=2-8

Therefore,b=-6

Answer 2

Answer:

the value of b is -10

Step-by-step explanation:

$p(x) = {x}^{2} + 3x + b$

$p(2) = {2}^{2} + 3(2) + b = 0$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 4 + 6 + b = 0$

$\: \: \: \: \: \: \: \: \: \: \: \: 10 + b = 0$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: b = - 10$