Find the roots by prime factorisation 2x2+x-6=0
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2x² + x - 6 = 0
= 2x² + 4x - 3x - 6 = 0
= ( 2x² + 4x ) ( - 3x - 6 ) = 0
= 2x ( x + 2 ) - 3 ( x + 2 ) = 0
= ( 2x - 3 ) ( x + 2 ) = 0
= x = 3/2 and x = - 2.
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