Simplify.
3x^2+5x-7x+3-5x^2+2
A: -2x^2+2x+5
B: -2x^2-2x+5
C: 2x^2-2x+5
D: 2x^2+2x+5
Group like terms:
(3x^2 - 5x^2) + (5x - 7x) + 3 + 2
-2x^2 - 2x + 5
Therefore, the answer is B: -2x^2-2x+5.
To simplify the expression 3x^2 + 5x - 7x + 3 - 5x^2 + 2, combine like terms:
3x^2 - 5x^2 + 5x - 7x + 3 + 2
(3x^2 - 5x^2) + (5x - 7x) + (3 + 2)
-2x^2 - 2x + 5
Therefore, the simplified expression is B: -2x^2 - 2x + 5.