Question

question number 1. 18²-17²=(_______)​

Answer 1

Answer:

Step-by-step explanation:

Option 1:

Straight forward way is 18² - 17²  = 324 - 289 = 35.

Option 2:

18² - 17²

This is of form a² - b², we know that a² - b² = (a + b) (a - b)

18² - 17²  = (18 + 17) ( 18 - 17)

              = 35 * 1

               = 35.

Answer 2

Answer:

35

Step-by-step explanation:

==: 18² - 17²

==: 324 - 289

==: 35  

            OR

a² - b² = (a + b) (a - b)

==: 18² - 17²

==: (18 - 17) (18 + 17)

==: 35

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