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6 × -24 = -144
n₁ × n₂ = -144
n₁ + n₂ = -7
9 × -16 = -144
9 + -16 = -7
6x² - 7x - 24 ⇒ 6x² - 16x + 9x - 24
⇒ ( 6x² - 16x ) + ( 9x - 24 )
⇒ 2x ( 3x - 8 ) + 3 ( 3x - 8 )
Yang ditebali memiliki bentuk yang sama, maka :
6x² - 7x - 24 ⇒