wiadomo, że
a= √2-3
b= - √2
c= √2+3
wyznacz. :
a+b=
a-b=
a*c
b*c
a + b = √2 - 3 + (-√2) = √2 - 3 - √2 = -3
a - b = √2 - 3 - (-√2) = √2 - 3 + √2 = 2√2 - 3
a * c = (√2 - 3) * (√2 + 3) = (√2)² - 3² = 2 - 9 = -7
b * c = -√2 * (√2 + 3) = - 2 - 3√2
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a + b = √2 - 3 + (-√2) = √2 - 3 - √2 = -3
a - b = √2 - 3 - (-√2) = √2 - 3 + √2 = 2√2 - 3
a * c = (√2 - 3) * (√2 + 3) = (√2)² - 3² = 2 - 9 = -7
b * c = -√2 * (√2 + 3) = - 2 - 3√2