Question

using identity evaluate (7.25)² - (2.75)²

Answer 1

Answer:

Step-by-step explanation:

(7.25)² - (2.75)²

Identity = a² - b² = (a - b)( a + b)

=(7.25 - 2.75) (7.25 + 2.75)

=(4.5)(10)

=45