2x-3>3x-4
2x-3x>-4+1
-x>-3
x<1
F(-4) = -4+4 = 0
f(2) = 2 + 4 = 6
f(b)= b + 4
f(b+2) = b+2+4 = b+6
удачи!
Y = 2X - 5
X^2 - 2X*(2X - 5) + (2X-5)^2 = 9
X^2 - 4X^2 + 10X + 4X^2 - 20X + 25 - 9 = 0
X^2 - 10X + 16 = 0
D = 100 - 4*1*16 = 100 - 64 = 36
V D = 6
X1 = (10 + 6) \ 2 = 8
X2 = 2
Y1 = 2X1 - 5 = 16 - 5 = 11
Y2 = 2X2 - 5 = 4 - 5 = - 1
Вместе х напишем 1.
3*1^2-а*1=0.
3-а=0
а=3.