Question

20. If the zeroes of the quadratic polynomial x2 + (a + 1)x + b are 2 and -3,
then
(A) a = -7, b = -1
(B) a = 5, b = -1
(C) a = 2, b = -6
(D) a = 0, b = -6​

Answer 1

Answer:

Step-by-step explanation:

The quadratic polynomial is x²+(a+1)x+b

The zeroes are 2&-3

Now sum of the zeroes

=-(a+1)/1=2+(-3)

Or, -(a+1)=-1

Or,a+1=1

Or,a=1-1=0

Product of the zeroes=b/1=-3×2=-6

Or,b=-6

So a=0 and b=-6

So option (D) is the correct answer.

Hope it will help you.