Question

The value of b for which the polynomial x^+5x+b is exactly divided by which number
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Answer 1

Answer:

x 3

−10x 2

+ax+b=f(x)

if f(x) is divisible by (x−1) and (x−2)

⇒f(1)=0=f(2)

f(1)=1−10+a+b=0⇒a+b=9

f(2)=8−40+2a+b=0⇒2a+b=32

∴a=23 b=−14

Step-by-step explanation:

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