Question

if -2 is a zero of the polynomial (PX )=X² +a X + 2 b and a + b =4 then​

Answer 1

Answer:

a = 3

b = 1

Step-by-step explanation:

Zero: -2

Polynomial [p(x)]: x² + ax + 2b

a + b = 4 —————————— 1

p(-2) = (-2)² + a (-2) + 2b = 0

4 - 2a + 2b = 0

2 (b - a) = -4

b - a = -2 —————————— 2

Adding equations 1 and 2,

2b = 2

b = 1

So, a + 1 = 4

a = 3

Answer 2

Answer:

Hope it's correct thank you (づ￣ ³￣)づ