Class 10

Math

All topics

Quadratic Equations

Which of the following is a Quadratic Equation?

- $5x+8=0$
- $6x_{2}+7x=19$
- $x+1$
- None of these

**Correct Answer: ** Option(b)

**Solution: **A Quadratic Equation is an equation with one variable and degree $2$. In options a, and c we have equations in one variable i.e. x . but the degree of the variable $x$ is $1$. While option b has one variable and the degree is $2$, hence $b$ is the correct option.