Question

find the square of 38 by using identity​

Answer 1

Answer:

1444

Step-by-step explanation:

Given number : 38

• We can write this as :

→ (40 - 2)²

Identity : (a - b)² = a² - 2ab + b²

Here, a = 40, b = 2

→(40)² - 2(40)(2) + (2)²

→ 1600 - 160 + 4

→ 1604 - 160

→ 1444

Or

• We can write this as :

→ (30 + 8)²

Identity : (a + b)² = a² + 2ab + b²

Here, a = 30, b = 8

→ (30)² + 2(30)(8) + (8)²

→ 900 + 480 + 64

→ 1444