find the remainder when x^3-3x^2+3x-1 is divided by x-1
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0 is the reminder. See the picture .
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*3x^2 in the diviser while all is correct
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Method 1 :
x² - 2 x + 1
_ _ _ _ _ _ _ _ _ _ _ _ _ _
x - 1 I x³ - 3 x² + 3 x - 1
I x³ - x²
I (-) (+)
I ----------------------
I - 2 x² + 3 x
I - 2 x² + 2 x
I (+) (-)
I ----------------------
I x - 1
I x - 1
I (-) (+)
I -------------
0
Hence Remainder is zero.
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Method 2 :
x - 1 = 0 ⇒ x = 1
p(x) = x³ - 3 x² + 3 x - 1
p(1) = (1)³ - 3(1)²+ 3(1) - 1
= 1 - 3 + 3 - 1
= 0
Hence remainder is zero.
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☺☺☺ Hope this Helps ☺☺☺
x² - 2 x + 1
_ _ _ _ _ _ _ _ _ _ _ _ _ _
x - 1 I x³ - 3 x² + 3 x - 1
I x³ - x²
I (-) (+)
I ----------------------
I - 2 x² + 3 x
I - 2 x² + 2 x
I (+) (-)
I ----------------------
I x - 1
I x - 1
I (-) (+)
I -------------
0
Hence Remainder is zero.
________________________________________________________
Method 2 :
x - 1 = 0 ⇒ x = 1
p(x) = x³ - 3 x² + 3 x - 1
p(1) = (1)³ - 3(1)²+ 3(1) - 1
= 1 - 3 + 3 - 1
= 0
Hence remainder is zero.
________________________________________________________
☺☺☺ Hope this Helps ☺☺☺
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