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Verified answer
Kuadratkan kedua ruas(x+3)²=(2x-1)²
x²+6x+9=4x²-4x+1
x²-4x²+6x+4x+9-1=0
-3x²+10x+8=0
3x²-10x-8=0
(3x+2)(x-4)
3x=-2
x=-2/3
atau x=4
HP={-2/3,4}