Question

Without calculating the squares,find the difference of the numbers as indicated below.
1. 203^2 - 202^2
2. 27^2 - 26^2

Answer 1

Answer:

• 405
• 53

Step-by-step explanation:

equation= a²-b²

= (a+b) ( a-b)

so, we can enter to the questions

• 203²-202²= (203+202) × (203-202)= 405×1=405
• 27²-26²=( 26+ 27)× (27-26)= 53×1=53

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