Rearranging the terms, we have:
3x^{2} + (5x - 7x^{2}) + 8 - (4x + 5)
= 3x^{2} + 5x - 7x^{2} + 8 - 4x - 5
= (3 - 7)x^{2} + (5 - 4)x + (8 - 5)
= -4x^{2} + x + 3
Therefore, the expression is equivalent to -4x^{2} + x + 3.
Which expression is equivalent to `3x^{2}\ +\ \left(5x\ -\ 7x^{2}\right)\ +\ 8\ -\ \left(4x\ +\ 5\right)\ `?
1 answer