oblicz korzystajac z odpowiedniego wzoru skroconego mnozenia 102 do kwadratu 99 do kwadratu 301 do kwadratu 45 do kwadratu 9,8 do kwadratu 5,1 do kwadratu wskazówka. 102do kwaadratu=(100+2)do kwadratu , 99 do kwadratu =(100-1) do kwadratu
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102²=(100+2)²=100²+2*2*100+2²=10000+400+4=10404
99²=(100-1)²=100²-2*100*1+1²=10000-200+1=10201
301²=(300+1)²=300²+2*300²1+1²=90000+600+1=90601
45²=(50-5)²=50²-2*50*5+5²=2500-500+25=2025
9,8²=(10-9,8)²=10²-2*10*9,8+9,8²=100-169+96,04=27,04
5,1²=(5+0,1)²=25²+2*5*0,1+0,1²=625+1+0.01=626,01
102^2=(100+2)^2=100^2+2*100*2+2^2=10000+400+4=10404
99^2=(100-1)^2=100^2-2*100*1+1^2=10000-200+1=9801
301^2=(300+1)^2=300^2+2*300*1+1^2=90000+600+1=90601
45^2=(50-5)^2=50^2-2*50*5+5^2=2500-500+25=2025
9,8^2=(9+0,8)^2=9^2+2*9*0,8+0,8^2=81+14,4+0,64=96,04
5,1^2=(6-0,9)^2=6^2-2*6*0,9+0,9^2=36-10,8+0,81=26,01
Pozdro ;)