Question

Use the difference of two squares to find the values of the following.

a. 72² - 28²
b. 85² - 25​

Answer 1

Explanation:

²

a. 72² - 28² = (72 + 28)(72 - 28) = 100 × 44 = 4,400

b. 85² - 25² = (85 + 25)(85 - 25) = 110 × 60 = 6,600