Question

find the square of 73 and 427 by diagonal method

Answer 1

73 square = 73 × 73 = 5329.
427 square = 427 ×427 = 182329

Or for short cut method


73 square = 70 square - 4900
70 × 3 - 210
3 × 70 - (+ ) 210
3 square - 9
_______
5329
________

427 square = 400 square-160000
400 × 27 - 10800
27 × 400 - 10800
27 square - 729
______
182329
______.

Answer 2

Answer:

182329

Step-by-step explanation:

73 square = 73 × 73 = 5329.

427 square = 427 ×427 = 182329

Or for short cut method

73 square = 70 square - 4900

70 × 3 - 210

3 × 70 - (+ ) 210

3 square - 9

_______

5329

________

427 square = 400 square-160000

400 × 27 - 10800

27 × 400 - 10800

27 square - 729

______

182329

______.