Question

If (x + 1) and (x-1) are factors of x² + ax³ + 2x²-3x + b then find the value of a and b
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Answer 1

Answer:

X=-1 and x=2

X^4+ax^3–3x^2+2x+b=0

Put x=-1

(-1)^4+a(-1)^3–3(-1)^2+2(-1)+b=0

1-a-3–2+b=0

-a+b-4 =0

-a+b=4=>(1)

Putx=2

16+8a-12+4+b=0

8a+b=-8=>(2)

equ.(1)-(2)

-9a=12

a =-4/3

Put equ.1 in a= -4/3

-(-4/3)+b=4

4/3+b=4

b=8/3

Answer 2

Step-by-step explanation:

this is the answer ..i have solved and clicked photosand uploaded it