Answer: 2(x+5)2+ 8x + 5+6=0
Explanation:
2(x + 5)2 + 8x + 5 + 6=0
2(x+5)(x+5) + 8x + 11=0
2(x^2+ 10x + 25) + 8x + 11=0
2x^2 +20x + 50 + 8x + 11=0
2x^2 +28x +66=0
This is a second-degree equation, the greatest power is two. Hence it is a quadratic equation.