factorise. 6a^2+17a+12
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6a^2+17a+12
6a^2+9a+8a+12
3a(2a+3)+4(2a+3)
(3a+4)(2a+3)
3a+4=0. 2a+3=0
3a=-4. 2a=-3
a=-4/3. a=-3/2
6a^2+9a+8a+12
3a(2a+3)+4(2a+3)
(3a+4)(2a+3)
3a+4=0. 2a+3=0
3a=-4. 2a=-3
a=-4/3. a=-3/2
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