zadanie 4 i 9 prosze o zrobienie. Treść w załącznikach :D
4. a)= ( 2 +1)( 2 -1) =2-1=1b) =(2+ 3)(2- 3)=4-3=1c) =( 7 - 3)( 7 + 3)= 7-3=4d) =(4-2 3)(4+2 3)= 16-12=49.
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4. a)
= ( 2 +1)( 2 -1) =2-1=1
b) =(2+ 3)(2- 3)=4-3=1
c) =( 7 - 3)( 7 + 3)= 7-3=4
d) =(4-2 3)(4+2 3)= 16-12=4
9.