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2)
(xy)2-(mn)2=x2y2-m2n2
3)
(1)2-(pierw z 2)2=1-2=-1
4)
(pier z 5)2-(2)2=5-4=1
5)
stosujac powyższa zasade ze a2-b2
mamy 7-3+4
6)
6-1=5
zad2
a)
(101)2
=(100+1)2=1000+2*100*1+1=1201
(202)2=2(100+1)2=2*1201=2402
zad3
a)
(72-23)(72+23)/(59-11)(59+11)=49*95/48*70=4655/3360
b)i c) robisz identycznie
b=1 i 34/1700
c=1
b)x²y²-m²n²
c)1-2=-1
d)5-4=1
e)7-3=4
f)12-1=11
2)
a)101²=(100+1)²= 10000+200+1=10201
202²=(200+2)²= 40000+800+4=40804
b)45²-35²=(45-35)(45+35)=10*80+800
72²-62²= (72-62)(72+62)=10*134=1340
225²-25²=(225-25)(225+25)=200*250=5000
3)
a)47²-23²/59²-11²=(47-23)(47+23)/(59-11)(59+11)=
=24*70/48*70=1680/3360=0.5
b)68²-34²/67²-33²=(68-34)(68+34)/67-33)(67+33)=
=34*102/34*100=3468/3400=1.02
c)78²-22²/114²-86²=(78-22)(78+22)/(114-86)(114+86)=
=56*100/28*200=5600/5600=1