Question 102425
factor: (2x+5)^2-(2x+5)-12 
I used the substitution method:
let u=2x+5 
u^2-u-12
(u-4)(u+3)
{(2x+5)-4}{2x+5)+3}
(2x+5-4)(2x+5+3)
(2x+1)(2x+8)
2(2x+1)(x+4) 
Correct
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Cheers,
Stan H.