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y=2x-10,maka
x²-4x-1=2x-10
x²-4x-1-2x+10=0
x²-6x+9=0
(x-3)(x-3)=0
x=3
maka y=2x-10 ⇒ 2(3)-10=6-10=-4
maka hp=( 3,(-4) )