Question

(x³-4x²+7x-5)+(13x-15x²+x³)

Answer 1

2x^3−19x^2+20x−5

Explanation:

combine the x's and numbers, when fully simplified:

2x^3−19x^2+20x−5

Answer 2

• 
  `\sf 2x^3-19x^2+20x-5`

Explanation:

`\sf\left(x^3-4x^2+7x-5\right)+\left(13x-15x^2+x^3\right)`

`\sf x^3-4x^2+7x-5+13x-15x^2+x^3`

`\sf x^3+x^3-4x^2-15x^2+7x+13x-5`

`\sf 2x^3-4x^2-15x^2+7x+13x-5`

`\sf 2x^3-19x^2+7x+13x-5`

`\sf 2x^3-19x^2+20x-5`