Question

Use FOIL to explain how to find the product of

(a + b)(a − b). Then describe a shortcut that you could use to get this product without using FOIL.

Answer 1

A² + 2AB - B²

Explanation:

Answer 2

Multiply the first, outside, inside, and last terms of the binomials.

Multiply a times a, a times -b, b times a, and b times -b.

This is the same as just squaring a and squaring b.

A shortcut is to add a squared and b squared

Explanation:

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