√(7-√ 7)² - (1/2 - √7)²
powinno wyjść - 1/4
Dziękuje i pozdrawiam.:)
√(7-√ 7)² - (1/2 - √7)²=
7-√7-(1/4-√7+7)=
7-√7-1/4+√7-7=
-1/4
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√(7-√ 7)² - (1/2 - √7)²=
7-√7-(1/4-√7+7)=
7-√7-1/4+√7-7=
-1/4