********************************
Ху - 4у + 3х - 12 = 0
ху + 3х = 4у + 12
х(у + 3) = 4у + 12
х = (4у + 12) : (у + 3)
х = 4 (у + 3) : (у + 3)
<u>х = 4</u>
A)Xb=-b/2a Xb=-8/8=-1 Yb=4*(-1)^2-8-1=4-9=-5
b)x=6/(-6)=-1 y=-3+6+2=5
в)-1/-2=1/2 y=-1/4+1/2-1=-3/4
г)-10x^4+5x^2=y t=x^2 -10t^2+5t=y tв=-5/-20=1/4 Xв=+-1/2 y1=-10*(-1/2)^4+5*1/4=-10/16+5/4=-5/8+5/4 -5/8+10/8=5/8 y2=5/8
(17/8-11/20)÷5/46=((17×20-8×11)/160)×46/5=((340-88)/160)×46/5=(252/160)×46/5=(63/20)×23/5=1449/100=14,49