Question

What is (2 +5)² - 4²

Answer 1

according to identity (a+b)² = a²+b²+2ab

therefore:

2²+5²+2×2×5 - 4²

= 4+25+20 - 16

=49 - 16

= 33

hope helps

Answer 2

33

Explanation:

(2+5)^2 - 4^2

(7^2) - 4^2

49 - 16 = 33