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2 pangkat x kuadrat + 3x + 4 = (2kuadrat) pangkat x+5
Jadi, x kuadrat + 3x +4 = x+5
=x kuadrat +2x -1 = 0
=x kuadrat + 2x = 1
=x kuadrat + 2x + 1 =1 + 1
=(x+1) kuadrat = 2
=(x+1) = akar 2
=x = akar 2 - 1
Hp = {x/x=akar 2-1, x bil. R}