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Answer:
b= -1/2 or b= -3
Explanation:
4b²+14b+6=0
4b²+12b+2b+6=0 {4×6=24, 12×2=24 and 12+2=14}
4b(b+3)+2(b+3)=0
(4b+2)(b+3)=0
4b+2=0 or b+3=0
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