Third binomial formula — (ax − b)(ax + b)
Expand the expression using the third binomial formula.
(1x − 2)(1x + 2) =
x² −
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What does the generator do?
The generator picks random whole numbers a, b between 1 and 7 and shows (ax − b)(ax + b). Fill in two coefficients: a² before x² and b² at the end.
How to solve
Square the first number and place it before x². Then subtract the square of the second number. There is no x-term — that is the beauty of the third formula.