Question

Using identites, evaluate the following: (7.25)² – (2.75)²​

Answer 1

Answer:

45

Step-by-step explanation:

(7.25)² – (2.75)²​

a^2 - b^2 = (a+b)(a-b)

= (7.25+2.75)(7.25-2.75)

= (10)(4.5)

= 45