Mathematics (9th Grade)
Subtracting polynomials
Which of the following is the correct result of subtracting (5x^2 - 3x + 4) from (7x^2 + 2x - 1)?
2x^2 + 5x + 3
2x^2 - 5x + 3
2x^2 - 5x + 5
2x^2 + 5x + 5