x1 = -6*1-5 = -11
x2 = -6*2-5 = -12-5 = -17
x3= -6*3-5 = -23
x4 = -6*4-5 = -29
x5 = -6*5-5 = -35
(a²-4)/2a : (3a+6)/4a²=(a-2)(a+2)/2a *4a²/3(a+2)=2a(a-2)/3
0,25x^2 + 1,5x*y + 2,25y^2
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(2y+1,4)*3,1=-6,2
6,2у+4,34=-6,2
6,2у=-6,2-4,34
6,2у=-10,54
у=-1,7