<span>654+а=823+37
654+а=860
а=860-654
а=206</span>
10+6=16
10+8=18
20+3=23
40+7=47
20+9=29
50+1=51
90+6=96
3(√2-3)/(√2-3)=3
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A(-2;1) B(x1;y1) AB(-2;3)
x1+2=-2⇒x1=-4
y1-1=3⇒y1=4
B(-4;4) C(x2;y2) BC(5;0)
x2+4=5⇒x2=1
y2-4=0⇒y2=4
C(1;4)
|AC|=√(1+2)²+(4-1)²=√(9+9)=√18=3√2