pierwiastek z liczby nieujemnej
wykonaj działania:
b).(√3+2√2)(4√3-√2)=
c).(√6-2√3)(2√6+6√3)=
d).(5√2-2√10)(-3√10-2√2)=
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b).(√3 + 2√2)(4√3 - √2)= 4*3 - √6 + 8√6 - 2*2 = 12 + 7√6 - 4 = 8 + 7√6
c).(√6 - 2√3)(2√6 + 6√3)= 2*6 + 6√18 - 4√18 - 12*3 = 12 + 2√18 - 36 = 2√(9*2) - 24 = 2*3√2 - 24 = 6√2 - 24
d).(5√2 - 2√10)(-3√10 - 2√2)= -15√20 - 10*2 + 6*10 + 4√20 = - 11√(4*5) - 20 + 60 = 40 - 11*2√5 = 40 - 22√5