Foil Calculator
Multiply two binomials using the FOIL method step by step.
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isCalculator Editorial Team
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How to use this tool?
How to Use the FOIL Calculator
This calculator multiplies two binomials in the form (ax + b)(cx + d) and shows the expanded result step by step.
- Enter the coefficients: Fill in the four input fields:
- a – coefficient of x in the first binomial
- b – constant term in the first binomial
- c – coefficient of x in the second binomial
- d – constant term in the second binomial
- Click "Calculate": Press the blue button to compute the result.
- Read the result: The expanded polynomial (e.g., 8x² - 2x - 15) appears in green.
- Review the steps: Below the result, a list shows each FOIL step (First, Outer, Inner, Last) and the final combination.
All inputs accept decimals and negative numbers. If any field is empty or invalid, an error message will appear.
Previous Results
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Frequently Asked Questions
FOIL stands for First, Outer, Inner, Last. It is a method for multiplying two binomials.
Yes, you can enter any real numbers for the coefficients and constants.
Use negative numbers for the constants or coefficients to represent subtraction.
