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` |