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5 November, 05:42

Solve by using

The Quadratic Formula

1) 2x² = 3x+14

2) 6x²-20=26x

3) 9x²+6x-8=0

4) 2x² + 13x+15=0

5) 2 x²+7x+6=0

6) 4x²+8x+3=0

7) x² + 3x-28=0

8) x ²-9=0

9) 5x²+10x=0

10) x² - x-12 = 0

(11) 12 x² + 7x + 1 = 0 12) 10x²+13x=30

+3
Answers (2)
  1. 5 November, 05:45
    0
    X=-b+/-sqrt b^2-4ac/2a

    1) x=-2 or x=7/2

    2) x=-2/3 or x=5

    3) x=-4/3 or x=2/3

    4) x=-5 or x=-3/2

    5) x=-2 or x=-3/2

    6) x = - 3/2 or x=-1/2

    7) x = - 7 or x=4

    8) x = - 3 or x=3

    9) x=-2 or x=0

    10) x = - 3 or x=4

    11) x = - 1/3 or x=-1/4

    12) x = - 5/2 or x = 6/5
  2. 5 November, 06:03
    0
    1) x=-2 or x=7/2

    2) x=-2/3 or x=5

    3) x=-4/3 or x=2/3

    4) x=-5 or x=-3/2

    5) x=-2 or x=-3/2

    6) x = - 3/2 or x=-1/2

    7) x = - 7 or x=4

    8) x = - 3 or x=3

    9) x=-2 or x=0

    10) x = - 3 or x=4

    11) x = - 1/3 or x=-1/4

    12) x = - 5/2 or x = 6/5
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Home » Mathematics » Solve by using The Quadratic Formula 1) 2x² = 3x+14 2) 6x²-20=26x 3) 9x²+6x-8=0 4) 2x² + 13x+15=0 5) 2 x²+7x+6=0 6) 4x²+8x+3=0 7) x² + 3x-28=0 8) x ²-9=0 9) 5x²+10x=0 10) x² - x-12 = 0 (11) 12 x² + 7x + 1 = 0 12) 10x²+13x=30
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