himpunan penyelesaian sistem persamaan, adalah
y = 2x² + 3x + 1
x² + 4x + 3 = 2x² + 3x + 1
2x² - x + 3x - 4x + 1 - 3 = 0
x² - x - 2 = 0
( x - 2 ) ( x + 1 ) = 0
x = 2 atau x = -1
x = -1
y = 2x² + 3x + 1
= 2(-1)² + 3(-1) + 1
= 2 - 3 + 1 = 0
x = 2
y = 2x² + 3x + 1
= 2.2² + 3.2 + 1
= 2.4 + 6 + 1
= 8 + 7 = 15
HP = ( x1, y1 ), ( x2, y2 ) = ( -1, 0 ), ( 2, 15 )
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