kaitlinfrasier kaitlinfrasier

03-10-2020
Mathematics

contestada

(9x-9)(9×+9), your finding the difference between two squares. im have some trouble in how to solve it.

Respuesta :

03-10-2020

Answer:

81x² - 81

Step-by-step explanation:

Step 1: Write expression

(9x - 9)(9x + 9)

Step 2: Expand by FOIL

81x² + 81x - 81x - 81

Step 3: Combine like terms

81x² - 81

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