MyMath Ink — Your notes, maths and proofs

Quadratic equations. A quadratic equation has the form $ax^2 + bx + c = 0$ with $a$ not equal to zero. The two solutions come from the formula below. x_{1,2} = \frac{-b \pm \sqrt{b^2-4ac}}{2a}. The term under the radical is the discriminant. It decides how many real solutions exist

MyMath source

Write Markdown + LaTeX. Use $...$ for inline maths and $$...$$ for display maths.

Loading saved notes…

# Quadratic equations

A quadratic equation has the form $ax^2 + bx + c = 0$ with $a$ not equal to zero. The two solutions come from the formula below.

$$
x_{1,2} = \frac{-b \pm \sqrt{b^2-4ac}}{2a}
$$

The term under the radical is the discriminant. It decides how many real solutions exist.

My handwriting

Draw the characters yourself and they replace the default hand. Everything stays in this browser.

Restore from a file