Question

(-11x^2 + 1.4x - 3) + (4x^2 - 2.7x + 8)

Answer 1

`\underline{\boxed{\sf{-7x^2 - (13)/(10) x +5}}}`

Solution :-

`\sf{(-11x^2 + 1.4x - 3) + (4x^2 - 2.7x + 8)}`

Remove the parentheses:

`\sf{-11x^2 + 1.4x - 3 + 4x^2 - 2.7x + 8}`

Convert decimal to fraction:

`\sf{-11x^2 + (14)/(10) x - 3 + 4x^2 - (27)/(10) x + 8}`

Reduce fraction to the lowest term by canceling the greatest common factor:

`\sf{-11x^2 + (7)/(5) x - 3 + 4x^2 - (27)/(10)x + 8}`

Combine like terms:

`\sf{-7x^2 - (13)/(10) x +5}`