﻿ Writing Quadratic Equations in Standard Form
WRITING QUADRATIC EQUATIONS IN STANDARD FORM
by Dr. Carol JVF Burns (website creator)
Follow along with the highlighted text while you listen!
• PRACTICE (online exercises and printable worksheets)
• Need some help identifying quadratic equations first?

A quadratic equation is an equation of the form $\,ax^2 + bx + c = 0\,$, where $\,a \ne 0\,$.
The form $\,ax^2 + bx + c = 0\,$ is called the standard form of the quadratic equation.

Notice that standard form is not unique.
For example, $\,x^2 - x + 1 = 0\,$ can be written as the equivalent equation $\,-x^2 + x - 1 = 0\,$.
Also, $\,4x^2 - 2x + 2 = 0\,$ can be written as the equivalent equation $\,2x^2 - x + 1 = 0\,$.

In this exercise, all answers are reported in the form $\,ax^2 + bx + c = 0\,$ with $\,a > 0\,$,
and where the greatest common factor of all nonzero coefficients is 1 .

In this exercise, you will practice writing quadratic equations in standard form.

EXAMPLES:
Question: Write $\,2x^2 = x + 4\,$ in standard form:
Answer: $\,2x^2 - x - 4 = 0\,$
Question: Write $\,3x = -x^2 + 7\,$ in standard form:
Answer: $\,x^2 + 3x - 7 = 0\,$
Question: Write $\,6x^2 - 6x = 12\,$ in standard form:
Answer: $\,x^2 -x - 2 = 0\,$
Question: Write $\,3x - 2 = 5x\,$ in standard form: