(4х+А)^2=B+C+y^2
(4х+у)^2=16х^2 + 8xy + y^2
(80 + 16(4х + 154)) = 55 * 48
(80 + 16(4х + 154)) = 2640
16(4х + 154) = 2640 - 80
16(4х + 154) = 2560
4х + 154 = 2560 : 16
4х + 154 = 160
4х = 160 - 154
4х = 6
x = 1 1/2
<u> x = 1,5</u>
X=0; -5y-10=0; -5y=10; y=-2; y=0; 2x-10=0; 2x=10; x=5; Две точки: (0;-2) и (5;0)
раскроем скобки в каждом случае:
1) =8*х^2*y+2*x*y^2-4*x^2*y^2
2) = x^2+2*x-3*x-6=x^2-x-6