If 6x^2 + x - 12 = (hx + b)(cx + d), then |h| + |b| + |c| + |d| =
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http://magoosh.com/gmat/2012/algebra-on ... to-factor/ Choose the correct choice from the following answers.
A) 10 B) 12 C) 15 D) 18 E) 20

Rationale: 6 x ^ 2 + x - 12 = 6 x ^ 2 + 9 x - 8 x - 12 = > 3 x ( 2 x + 3 ) - 4 ( 2 x + 3 ) = > ( 2 x + 3 ) ( 3 x - 4 ) = ( hx + b ) ( cx + d ) hence h = 2 , b = c = 3 , d = - 4 so , 2 + 3 + 3 + | - 4 | = 2 + 3 + 3 + 4 = 12 answer b .
Answer: B