find the square of 38 by using identity
Answers
Answered by
7
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
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