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(1,-1) |-1=1+3=4,-1+(-1)=-2
(5,-4)&(4,-2)
Direfleksikan x=4
Rumus x=h----->(2h-x, y)
A(5,-4)__>A'(2.4-5,-4)=(8-5,-4)=(3,-4)
A(4,-2)__>A'(2.4-4,-2)=(8-4,-2)=(4,-2)
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