The square of 42 is:
Answer & explanation
Correct answer: option 4
42 x 42 = 1764
OR
(a - b)2 = (50 - 8)2
502 + 82 - 2 x 50 x 8
2500 + 64 - 800
2564 - 800
= 1764
The square of 42 is:
Correct answer: option 4
42 x 42 = 1764
OR
(a - b)2 = (50 - 8)2
502 + 82 - 2 x 50 x 8
2500 + 64 - 800
2564 - 800
= 1764