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9 November, 23:31

Solve the following for x:

2 х2 + 9x + 9 = - 1

х=4 or x=5

Ox=-5/2 or x=-2

Ox=2/5 оr x=-2

х=2 or x=9

+5
Answers (1)
  1. 10 November, 02:07
    0
    Step-by-step explanation:

    2x (squared) + 9x+9=-1

    2x (squared) + 9x+9+1=0

    2x (squared) + 9x+10=0

    multiply the coefficient of x and 10=2x10=20

    2x (squared) + 9x+10=0

    look for two numbers that when added gives 9and when multiplied gives 20

    2x (squared) + 5x+4x+10=0

    (2x (squared) + 5x) + (4x+10) = 0

    find the number and letters that are common in the equations

    x (2x+5) + 2 (2x+5) = 0

    (x+2) (2x+5) = 0

    x+2=0

    collect like terms

    x=0-2

    x=-2

    2x+5=0

    collect like terms

    2x=0-5

    2x=-5

    divide both sides by 2

    2x/2=-5/2

    x=-5/2

    so x=-2 and - 5/2
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