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= 1 (2x pangkat2 + 7x + 3)
= 1/2 kali 2(2x pangkat2 +7x + 3)
= 1/2 (4x pangkat 2 + 14x + 6)
= 1/2 (2x+6)(2x+1)
atau
2x pangkat2 + 7x + 3 = (x+3)(2x+1)
= 1 (x+3)(2x+1)
= 1/2 kali 2 (x+3)(2x+1)