a² - b² = (a - b)(a + b)
1/(4 - 3√2) * 1/(4 + 3√2) = 1/(4² - (3√2)²) = 1/(16 - 18) = -1/2 (если *)
----
1/(4 - 3√2) - 1/(4 + 3√2) = (4 + 3√2 - (4 - 3√2))/(4 - 3√2)(4 + 3√2) = (4 + 3√2 - 4 + 3√2)/(4² - (3√2)²) = 6√2/(16 - 18) = -3√2 (если -)
Copyright © 2025 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Verified answer
a² - b² = (a - b)(a + b)
1/(4 - 3√2) * 1/(4 + 3√2) = 1/(4² - (3√2)²) = 1/(16 - 18) = -1/2 (если *)
----
1/(4 - 3√2) - 1/(4 + 3√2) = (4 + 3√2 - (4 - 3√2))/(4 - 3√2)(4 + 3√2) = (4 + 3√2 - 4 + 3√2)/(4² - (3√2)²) = 6√2/(16 - 18) = -3√2 (если -)