Question

Which equation is quadratic in form?
© 2(x + 5)2 + 8x + 5+6 = 0
x6 + 6x +8=0
7x6 + 36x3 + 5 = 0
4x9 + 20x2 + 25 = 0

Answer 1

2(x+5)2+8x+5+6=0 is the answer

Answer 2

Answer: 2(x+5)2+ 8x + 5+6=0

Step-by-step 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.