Quadratic root plus Calculator

How to calculate quadratic root plus

This tool calculates quadratic root plus from Coefficient a, Coefficient b, Coefficient c. Enter each quantity in its labelled field, then use the formula below to check the calculation.

Formula

(−b + √(b² − 4ac)) ÷ (2a)

Worked example

Coefficient a

1

Coefficient b

-5

Coefficient c

6

Applying the formula to these values gives 3 .

What should I check?

Calculate powers, roots, logarithms, ratios, slopes and trigonometric functions. Trigonometric angles are entered in degrees.

Use the reset button to restore this example. Your inputs are processed in this browser and are not included in a shared calculator link. See our methodology and limitations.