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A quadratic equation in the variable $x$ is an equation of which form?
A$ax+b=0$, where $a\neq 0$
B$ax^2+bx+c=0$, where $a,b,c$ are real numbers and $a\neq 0$
C$ax^3+bx^2+c=0$, where $a\neq 0$
D$\dfrac{a}{x}+b=0$, where $a\neq 0$
Answer & Solution
Correct answer: B. $ax^2+bx+c=0$, where $a,b,c$ are real numbers and $a\neq 0$
A quadratic equation is defined as an equation of degree 2 in one variable. Its standard form is $ax^2+bx+c=0$, where $a,b,c$ are real numbers and $a\neq 0$.
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