Question

4) If one zero of the quadratic polynomial x² + 3x + b is 2, then the value of b is (a) 10 (b) -8 (c) 9 (d) -10​

Answer 1

D] -10.

Step-by-step explanation:

Since, One zero is given , substituting it's value in the given polynomial.

(2)²+3×2+b=0

4+6+b=0

10+b=0

b= -10.