1. Find Subtraction of `3x^2-10x+25` and `x^2+2x+2`Solution:`(3x^2-10x+25) - (x^2+2x+2)`
`=color{blue}{ 3x^2}color{green}{ - 10x}color{red}{ + 25}color{blue}{ - x^2}color{green}{ - 2x}color{red}{ - 2}` (Distribute and Identify like terms)
`=color{blue}{ 3x^2}color{blue}{ - x^2}color{green}{ - 10x}color{green}{ - 2x}color{red}{ + 25}color{red}{ - 2}` (Rearrange terms to get like terms together)
`=color{blue}{ 2x^2}color{green}{ - 12x}color{red}{ + 23}` (Combine like terms)
Method-2: Subtract using the Vertical method | `` | `3x^2` | `-` | `10x` | `+` | `25` |
| - | `` | −`x^2` | `+` | −`2x` | `+` | −`2` |
|
| `` | `2x^2` | `-` | `12x` | `+` | `23` |
2. Find Subtraction of `4x^3-2x^2+x-8` and `x^3-4x^2-4x-1`Solution:`(4x^3-2x^2+x-8) - (x^3-4x^2-4x-1)`
`=color{maroon}{ 4x^3}color{blue}{ - 2x^2}color{green}{ + x}color{red}{ - 8}color{maroon}{ - x^3}color{blue}{ + 4x^2}color{green}{ + 4x}color{red}{ + 1}` (Distribute and Identify like terms)
`=color{maroon}{ 4x^3}color{maroon}{ - x^3}color{blue}{ - 2x^2}color{blue}{ + 4x^2}color{green}{ + x}color{green}{ + 4x}color{red}{ - 8}color{red}{ + 1}` (Rearrange terms to get like terms together)
`=color{maroon}{ 3x^3}color{blue}{ + 2x^2}color{green}{ + 5x}color{red}{ - 7}` (Combine like terms)
Method-2: Subtract using the Vertical method | `` | `4x^3` | `-` | `2x^2` | `+` | `x` | `-` | `8` |
| - | `` | −`x^3` | `-` | +`4x^2` | `-` | +`4x` | `-` | +`1` |
|
| `` | `3x^3` | `+` | `2x^2` | `+` | `5x` | `-` | `7` |
3. Find Subtraction of `8x^3+10x-6` and `2x^2-4x+1`Solution:`(8x^3+10x-6) - (2x^2-4x+1)`
`=color{maroon}{ 8x^3}color{green}{ + 10x}color{red}{ - 6}color{blue}{ - 2x^2}color{green}{ + 4x}color{red}{ - 1}` (Distribute and Identify like terms)
`=color{maroon}{ 8x^3}color{blue}{ - 2x^2}color{green}{ + 10x}color{green}{ + 4x}color{red}{ - 6}color{red}{ - 1}` (Rearrange terms to get like terms together)
`=color{maroon}{ 8x^3}color{blue}{ - 2x^2}color{green}{ + 14x}color{red}{ - 7}` (Combine like terms)
Method-2: Subtract using the Vertical method | `` | `8x^3` | `+` | `0x^2` | `+` | `10x` | `-` | `6` |
| - | | | `` | −`2x^2` | `-` | +`4x` | `+` | −`1` |
|
| `` | `8x^3` | `-` | `2x^2` | `+` | `14x` | `-` | `7` |
4. Find Subtraction of `6x^3+x^2+2x+6` and `x^3+4x^2-4x-16`Solution:`(6x^3+x^2+2x+6) - (x^3+4x^2-4x-16)`
`=color{maroon}{ 6x^3}color{blue}{ + x^2}color{green}{ + 2x}color{red}{ + 6}color{maroon}{ - x^3}color{blue}{ - 4x^2}color{green}{ + 4x}color{red}{ + 16}` (Distribute and Identify like terms)
`=color{maroon}{ 6x^3}color{maroon}{ - x^3}color{blue}{ + x^2}color{blue}{ - 4x^2}color{green}{ + 2x}color{green}{ + 4x}color{red}{ + 6}color{red}{ + 16}` (Rearrange terms to get like terms together)
`=color{maroon}{ 5x^3}color{blue}{ - 3x^2}color{green}{ + 6x}color{red}{ + 22}` (Combine like terms)
Method-2: Subtract using the Vertical method | `` | `6x^3` | `+` | `x^2` | `+` | `2x` | `+` | `6` |
| - | `` | −`x^3` | `+` | −`4x^2` | `-` | +`4x` | `-` | +`16` |
|
| `` | `5x^3` | `-` | `3x^2` | `+` | `6x` | `+` | `22` |
5. Find Subtraction of `x^4-4x^3-4x+4` and `x^4-x^2+2x-2`Solution:`(x^4-4x^3-4x+4) - (x^4-x^2+2x-2)`
`=color{fuchsia}{ x^4}color{maroon}{ - 4x^3}color{green}{ - 4x}color{red}{ + 4}color{fuchsia}{ - x^4}color{blue}{ + x^2}color{green}{ - 2x}color{red}{ + 2}` (Distribute and Identify like terms)
`=color{fuchsia}{ x^4}color{fuchsia}{ - x^4}color{maroon}{ - 4x^3}color{blue}{ + x^2}color{green}{ - 4x}color{green}{ - 2x}color{red}{ + 4}color{red}{ + 2}` (Rearrange terms to get like terms together)
`=color{maroon}{ - 4x^3}color{blue}{ + x^2}color{green}{ - 6x}color{red}{ + 6}` (Combine like terms)
Method-2: Subtract using the Vertical method | `` | `x^4` | `-` | `4x^3` | `+` | `0x^2` | `-` | `4x` | `+` | `4` |
| - | `` | −`x^4` | `+` | −`0x^3` | `-` | +`x^2` | `+` | −`2x` | `-` | +`2` |
|
| | | `-` | `4x^3` | `+` | `x^2` | `-` | `6x` | `+` | `6` |
This material is intended as a summary. Use your textbook for detail explanation.
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