Question

(y^2 - 3y - 5) - ( -y^2-7y+4 ):

Answer 1

Answer:

$(y {}^{2} - 3y - 5) - ( - {y}^{2} - 7y + 4) \\ {y}^{2} - 3y - 5 + {y}^{2} + 7y - 4 \\ 2 {y}^{2} + 4y - 9$

A is the correct answer