Question

Find the square of 45 without real calculation​

Answer 1

Answer:

(45)^2

(40 + 5) ^2

Using identity,

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

(40 + 5)^2 = 40^2 + 2 × 40 × 5 × 5^2

(40 + 5)^2 = 1600 + 400 + 25

(40 + 5)^2 = 2025

Ans. 45^2 = 2025

^__^ ....

Step-by-step explanation:

Hope help u

Answer 2

Answer:

the root of 45 is 6.709 approx