(x+3)(2x-7) < (4-x)(3-2x)
2x² -x - 21 < 12 - 11x + 2x²
-x + 11x < 12 + 21
10x < 33
Если x=4, y=-3, то:
4^2+2*4*(-3)+-3^2 = 16 - 24 + 9 = 1
1)у= 0.7, 1.22, 1.6 2)x= 0.25, 2.25, 6.25