Jika a=2 dan b= -2 X=(a-b)2 dan y=(b-a)2
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b = -2
x = (a-b)² = (2-(-2))² = (2+2)² = 4² = 16
y = (b-a)² = (-2-2)² = (-4)² = 16
=a²-2ab+b²
=2²-2.2.(-2)+(-2)²
=4+8+4
=16
y= (b-a)(b-a)
=b²-2ab+a²
=(-2)²-2.2(-2)+2²
=4+8+4
=16
jadi X=Y