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4. Oblicz

a) ( √7 + 1) ² =

b) (√5 - 3)² =

c) (6 - √3) ² =

d) ( √3 + √2)² =

e) (√6 + √15)² =

f) ([√2 :2] - √6) ² =

7. Oblicz

a) (5 - √7)*(5 + √7) =

b) (√5 + 1)*(1 - √5) =

c) (⅓ + [√6 :2]) * (⅓ - [√6 : 2])

d) (2√2 - 3)*(3+2√2)=

e) (√2 - √3)*(√2 + √3) =

f) (√5 + [√2 : 2]) ( (√5 - [√2 : 2]) =


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