using suitable identity find 23^2-7^2
Answers
Answered by
3
23^2-7^2
529-49
480
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Answered by
3
Answer:
480
Step-by-step explanation:
We can solve this by using (a² - b²) = (a + b)(a - b) identity.
=> 23² - 7² = a² - b²
Comparing, a = 23 and b = 7.
=> a² - b² = 23² - 7²
=> 23² - 7² = (23 + 7)(23 - 7)
=> 30*16 => 480 is the answer.
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