Question

Which of the following is/are linear equations?

• A. $2x+3$
• B. $2x^2+3$
• C. $2x+3=0$
• D. Both B and C

Answer 1

The correct option is C $2x+3=0$

An equation in which the highest power of the variable is '1' is called a linear equation. $2x+3$ is not an equation as it does not have an equality sign in it. The highest power of x in $2x^2+3$ is '2', so it is not a linear equation. The highest power of $x$ in $2x+3=0$ is '1', hence it is a linear equation.