Question

(4x²- 5x² - 7x+1) +(4x-1)​

Answer 1

4x² - 5x - 3x is the answer

Answer 2

$\left(4x^2-5x^2-7x+1\right)+\left(4x-1\right)$

$=4x^2-5x^2-7x+1+4x-1$

$=4x^2-5x^2-7x+4x+1-1$

$=-x^2-7x+4x+1-1$

$=-x^2-3x+1-1$

$=-x^2-3x$