6x² - 5x - 21 = 0 solve the following by factorization
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→ 6x² - 5x - 21 = 0
→ 6x² - 14x + 9x - 21 = 0
→ 2x ( 3x - 7 ) + 3 ( 3x - 7 )
→ (2x + 3) (3x - 7)
→ x = -3/2 or x = 7/3
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