Question

7-2√10/3*7+2√10/3 simplify it ​

Answer 1

Answer:

401/9

Step-by-step explanation:

7 - 2√10/3 ×7+2√10/3

According to a^2 - b^2,

7^2 - (2√10/3)^2

49 - (40/9)

(441 - 40)/9

401/9

Answer 2

Answer:

1

Step-by-step explanation:

7 - 2✓10 7 + 2✓10

------------- x -------------

3 3

(7 - 2✓10) x (7 + 2✓10)

==> -------------------------------

3 x 3

7² - (2✓10)²

==> -------------------

9

49 - 2²(10)

==> -----------------

9

49 - 40

==> ---------------

9

==> 9/9

==> 1

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