13x3-19x2+12x+14,2x2-x+1 find the quotient and remainder
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Problem: Divide
x4 - 2x3 + 8x - 14
x2 - 3

Set up the long division.
Notice the 0's put in as place
holders for missing powers of x.

x2 =
x4
x2
.
Choose x2 since
x2 · x2 matches x4.

x4 + 0x3- 3x2 = x2(x2 + 0x - 3).

Subtract x4 + 0x3 - 3x2 from
x4 - 2x3 + 0x2 + 8x - 14.
Result is -2x3 + 3x2 + 8x - 14.

-2x =
-2x3
x2
.
Choose -2x since
-2x · x2 matches -2x3.

-2x3 + 0x2 + 6x = -2x(x2 + 0x - 3).

Subtract -2x3 + 0x2 + 6x from
-2x3 + 3x2 + 8x - 14..
Result is 3x2 + 2x - 14.

3 =
3x2
x2
.
Choose 3 since
3 · x2 matches 3x2.

3x2 + 0x2 - 9 = 3(x2 + 0x - 3).

Subtract 3x2 + 0x2 - 9 from
3x2 + 2x - 14..
Result is 2x - 5.
2x - 5 is the remainder.
Answer:
x4 - 2x3 + 8x - 14
x2 - 3
=
x2 - 2x + 3 +
2x - 5
x2 - 3
.
Notes
x4 - 2x3 + 8x - 14 = (x2 - 3)(x2 - 2x + 3) + 2x - 5
Dividend
x4 - 2x3 + 8x - 14
Divisor
x2 - 3
Quotient
x2 - 2x + 3
Remainder
2x -
x4 - 2x3 + 8x - 14
x2 - 3

Set up the long division.
Notice the 0's put in as place
holders for missing powers of x.

x2 =
x4
x2
.
Choose x2 since
x2 · x2 matches x4.

x4 + 0x3- 3x2 = x2(x2 + 0x - 3).

Subtract x4 + 0x3 - 3x2 from
x4 - 2x3 + 0x2 + 8x - 14.
Result is -2x3 + 3x2 + 8x - 14.

-2x =
-2x3
x2
.
Choose -2x since
-2x · x2 matches -2x3.

-2x3 + 0x2 + 6x = -2x(x2 + 0x - 3).

Subtract -2x3 + 0x2 + 6x from
-2x3 + 3x2 + 8x - 14..
Result is 3x2 + 2x - 14.

3 =
3x2
x2
.
Choose 3 since
3 · x2 matches 3x2.

3x2 + 0x2 - 9 = 3(x2 + 0x - 3).

Subtract 3x2 + 0x2 - 9 from
3x2 + 2x - 14..
Result is 2x - 5.
2x - 5 is the remainder.
Answer:
x4 - 2x3 + 8x - 14
x2 - 3
=
x2 - 2x + 3 +
2x - 5
x2 - 3
.
Notes
x4 - 2x3 + 8x - 14 = (x2 - 3)(x2 - 2x + 3) + 2x - 5
Dividend
x4 - 2x3 + 8x - 14
Divisor
x2 - 3
Quotient
x2 - 2x + 3
Remainder
2x -
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