Question

4.Using pattern of square numbers, the square of 45 can be written as

(1 Point)​

Answer 1

Answer:

40^2 + 5^2

I think you will understand

Answer 2

Answer:

2025

Step-by-step explanation:

(45)² can be written as $(50-5)^{2}$

⇒ $(50-5)^{2}$

⇒ 50² - ( 2 × 50 × 5 ) + 5²                                 ∵ ( a - b )² = a² - 2ab + b²

⇒ 2500 - 500 + 25

⇒ 2500 + 25 - 500

⇒ 2525 - 500

⇒ 2025

∴ 2025 is the answer