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a - bok dużego kwadratu = 6
P - pole dużego kwadratu = a² = 6² = 36
P₁ - pole mniejszego kwadratu = 36 : 2 = 18
a₁ - bok mniejszego kwadratu = √18 = √(9 * 2) = 3√2
odp C
zad 6
3√8 + 2√2 = 3√(4 * 2) + 2√2 = 3 * 2√2 + 2√2 = 6√2 + 2√2 = 8√2
odp B
zad 7
5√180 = a√5
5√(36 * 5) = a√5
5 * 6√5 = a√5
30√5 = a√5
a = 30
odp B
zad 8
∛54 + √150 = ∛(27 * 2) + √(25 * 6) = 3∛2 + 5√6
odp A