Question

if (x-1) and (x-2) are the factors of P(x)= x3-3ax2+5x+b, find a and b

Answer 1

Answer:

ehxiajri2wijsajakwowo

Answer 2

Answer:

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Step-by-step explanation:

first we take ( x-1 )

so, x = 1

put x=1 in give equation

1 - 3a+5+b=O

b-3a=-6 .........(1)

now, we take (x-2)

so, X=2

put it in give equation

8-6a+10+b=0

b-6a=-18 .........(2)

intersect equation 1 and 2

b-6a=-18

b-3a=-6

so it becomes

a= -4

than put a in any equation

b-3(-4)=-6

b+12=-6

b=-18

so the answer is

(a,b) = (-4,-18)