Question

solve this question ​

Answer 1

Explanation:

$41^{2} - {40}^{2}$

$= (41 + 40)(41 - 40)$

$= (81)(1)$

$= 81$

The equation to be used is

${x}^{2} - {y}^{2} = (x + y)(x - y)$

Answer: 81

Answer 2

Answer:

1681-1600

81

because

41 square =1681

40square=1600