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x² + 3x + 2 = (x + 2)(x + 1)
4x + 10 - (x² + x)/x² + 3x + 2
= 4x + 10 - x² - x / x² + 3x + 2
= -x² + 3x + 10 / x² + 3x + 2
turunkan
= -2x + 3 / 2x + 3
masukkan nilai -2
= -2(-2) + 3 / 2(-2) + 3
= 4 + 3 / -4 + 3
= 7 / -1
= -7