2.6절 5-1
f(x)=(x+2)^2
plot(f(x), (x, -5, 3), ymax=10, ymin=-10, color='red')+point((-2, 0), color='red')
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2.6절 5-2
f(x)=(x+3)^2-4
plot(f(x), (x, -7, 2), ymax=10, ymin=-8)+point((-3, -4), color='red')
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2.6절 5-3
f(x)=-2*(x+3)^2+3
plot(f(x), (x,-6,2), ymax=5, ymin=-20,color='red')+point((-3, 3), color='red')
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2.6절 5-4
f(x)=x^2+6*x+5
plot(f(x), (x, -6, 1), ymin=-8,ymax=10,color='red')+point((-3, -4), color='red')
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2.6절 5-5
f(x)=-x^2-x+2
plot(f(x), (x,-3,2),ymax=5,ymin=-10)+point((-(1/2), 9/4), color='red')
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2.6절 5-6
f(x)=-2*x^2-4*x-2
plot(f(x), (x,-2,1),ymax=2,ymin=-10)+point((-1, 0), color='red')
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2.6절 5-7
f(x)=(1/2)*x^2+2*x+4
plot(f(x), (x,-4,1), ymin=1,ymax=6)+point((-2, 2), color='red')
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2.6절 5-8
f(x)=-2*x^2+2*x-(5/2)
plot(f(x), (x,-2,4),ymax=0,ymin=-6)+point((1/2, -2), color='red')
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