Question

Which of the following is not a quadratic equation *
x² – 9 = 0
3 + x + x² = 0
x² + x3+ 2 = 0
x² + 3x – 5 = 0​

Answer 1

x²+x³+2=0

Step-by-step explanation:

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Answer 2

Answer:

c) x^2 + x^3 + 2 = 0

Step-by-step explanation:

A quadratic equation is a polynomial equation with a highest degree 2 contained in it.

Thus,

It is clear that x^2 + x^3 + 2 = 0. is not a quadratic equation as it has a highest degree 3 in it.

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