Question

Tman2, tolong d jawab dong..
ini urgent

Answer 1

Y = 1/2 x^2 - 2x - 5/2
y = 1/2( x^2 - 4x - 5)

y = 0 --> 1/2(x-5)(x+1) = 0
x = 5 atau x = -1
titk pot dgn sb x --->A (-,1, 0) dan B (5, 0)

tik pot dgn sumbu y, x = 0
y = 1/2 (x-5)(x+1) --> x = 0 --> y = 1/2 (-5)(1)  = - 5/2
C =(0, - 5/2)

titik puncak P 
x= - b/2a = -(-2) /(2(1/2) = 2/1 = 2
y = 1/2 (2^2) - 2(-2) - 5/2
y = 2 - 4 - 5/2
y = - 9/2
P(2, - 9/2)

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