Subtract the square of 21 from the square of 22 without actually calculating the squares.
Answers
Answered by
1
Answer:
Given,
We need to Subtract the square of 21 from the square of 22 without actually calculating the squares.
Using the formula
We get...
Answered by
2
Explanation:
let one number be a and another be b
here,
a = 21
b = 22
a² - b² = (a + b) (a -b)
= (22 + 21)(22 - 1)
= 43
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