Question

помогите пожалуйста с алгеброй​

Answer 1

1) (3x^2 + 2x – 5) + (6x + 4) = 3x^2 + 8x + 1

2) (3x^2 + 2x – 5) – (6x + 4) = 3x^2 – 4x – 1

3) – (3x^2 + 2x – 5) + (6x + 4) = – 3x + 4x + 9

4) – (3x^2 + 2x – 5) – (6x + 4) = – 3x^2 – 8x + 1