f(x)=(x+3/2)^2-29/4 x∈{t,t+1}
(1)t∈[-5/2,-3/2]
f(x)min=h(t)=-29/4
(2)t∈{-∞,-5/2}
h(t)=(t+5/2)^2-29/4
(3)t∈{-3/2,+∞}
h(t)=(t+3/2)^2-29/4