Question

(2x²-9x+2)+(3x²+7x-1)?

Answer 1

(2x²-9x+2)+(3x²+7x-1)?
2x²-9x+2+3x²+7x-1
5x² - 2x + 1

Answer 2

2x² -9x + 2 + 3x² + 7x -1 =
5x² - 2x +1 = 
Δ=b² - 4.a.c
Δ= 4 - 4. 5. 1
Δ= 4 - 20
Δ= -16

(impossível)