Math

12x^2 + 21x + 9 = 0 Factor and solve

Asked by AnneS2 on 22 Jun 11:47

Last updated by anonymous on 23 Jun 11:01

1 Answers

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Answered by CherieS on 23 Jun 11:01

12x^2 + 21x + 9 = 0

3(4x^2+7x+3)=0

3(x )(4x ) ( +1)( +3)=0

3 (x+1) (4 x+3) = 0

Solve:

3 (x+1)=0

3 (x) (3)(+1)=0

3x+3=0

3x+3-3=0-3

3x=-3

3x/3=-3/3

x=-1

Solve

3(4 x+3) = 0

3(4 x) (3)(+3) = 0

12x+9=0

12x+9-9=0-9

12x=-9

12x/12=-9/12

x=-9/12=-3/4