a²-b=(2-5)²-(-2)=37-20-4+4=33-16
Odpowiedź:
a = 2√3 - 5 , b = √8 - 2√6
a² - √2b = (2√3 - 5)² - √2(√8 - 2√6) =
= 4 * 3 - 20√3 + 25 - √(2 * 8) + 2√(2 * 6) = 12 - 20√3 + 25 - √16 + 2√12 =
= 37 - 20√3 - 4 + 2√(4 * 3) = 33 - 20√3 + 2 * 2√3 =
= 33 - 20√3 + 4√3 = 33 - 16√3
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a²-b=(2-5)²-(-2)=37-20-4+4=33-16
Odpowiedź:
a = 2√3 - 5 , b = √8 - 2√6
a² - √2b = (2√3 - 5)² - √2(√8 - 2√6) =
= 4 * 3 - 20√3 + 25 - √(2 * 8) + 2√(2 * 6) = 12 - 20√3 + 25 - √16 + 2√12 =
= 37 - 20√3 - 4 + 2√(4 * 3) = 33 - 20√3 + 2 * 2√3 =
= 33 - 20√3 + 4√3 = 33 - 16√3