Question

(45)^2 + (21)^2 = (?)^2 + 257 a) 51 b) 49 c) 45 d) 47 e) None of these​

Answer 1

(45)2 + (21)2 = (?)2 + 257

= 2025 + 441 – 257 = 2209. Hence, option e is correct.

Answer 2

Step-by-step explanation:

For this:

Given,

45^2 = 2025

21^2 = 441

2025+441 = 2466

2466-257 = 2209

√2209 = 47 ( for answer in square)

CROSSCHECK

47 ^2+2209 = 2466

ANSWER:

(45)^2 + (21)^2 = 47^2 + 257

option d is correct