86.9k views
3 votes
3x2 +4x -7=0 porfavor

User Sullivan
by
8.0k points

1 Answer

6 votes

Answer:

Explanation:

Factor:

3x² + 4x - 7=0 >Multiply first and last = -21 Find 2 numbers that

multiply to -21 but add to +4

+7 and -3 multiply to -21 but add to +4

>Replace middle term with +7 and -3

3x² + 7x - 3x - 7=0 >Group the first 2 terms and last 2 terms

(3x² + 7x)( - 3x - 7)=0 >Take out GCF from each grouping

x(3x+7) -1 (3x+7)=0 >Take out GCF (3x+7)

(3x+7)(x -1) =0 >Set each parentheses =0

(3x+7)=0 and (x -1) =0 >Solve for x

x = -7/3 x=1

User Kristiono Setyadi
by
7.9k points

No related questions found