Question

Add or subtract (7x^2-x-2)-(-6x^3+3)

Answer 1

`6 {x}^(3) + 7 {x}^(2) - x - 5`

Explanation:

`(7 {x}^(2) - x - 2) - ( - 6 {x}^(3) + 3)`

➡️
`7 {x}^(2) - 2 - ( - {6}^(3) + 3)`

➡️
`7 {x}^(2) - x - 2 + 6 {x}^(3) - 3`

• -2 - 3
• -(2 + 3)
• -5

➡️
`7 {x}^(2) - x - 5 + 6 {x}^(3)`

➡️
`6 {x}^(3) + 7 {x}^(2) - x - 5` ✅

Answer 2

`\tt{}6x ^(3) + {7x}^(2) - x - 5`

Explanation:

`\tt{}(7 {x}^(2) - x - 2) - ( - 6 {x}^(3) + 3)`

`\tt{}7 {x}^(2) - x - 2 + 6x^(3) - 3`

`\tt{} {7x}^(2) - x - 5 + 6x ^(3)`

`\tt{}6x ^(3) + {7x}^(2) - x - 5`