Answer:
maybe this is thee answer
x1 = -3,303
x2 = 0,303
Step by step:
2x² + 5x = (x +1)²
2x² + 5x = x² + 2x + 1
0 = x² + 3x - 1
x1 = -3/2 - √(9/4 +1)
x2 = -3/2 + √(9/4 +1)
