456r8678
456r8678 456r8678
  • 08-04-2020
  • Mathematics
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16(6−5x)^2+17=42 Please solve for all the possible solutions to x.

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Аноним Аноним
  • 08-04-2020

Answer: [tex]x=19/20[/tex] [tex]or[/tex] [tex]x=29/20[/tex]

Simplify both sides of the equation

[tex]400x^2-960x+593=42[/tex]

Subtract 42 from both sides

[tex]400x^2-960x+593-42=42-42\\400x^2-960x+551=0[/tex]

Factor left side of equation

[tex](20x-19)(20x-29)=0[/tex]

Set factors equal to 0

[tex]20x-19=0[/tex]   [tex]or[/tex]     [tex]20x-29=0[/tex]

[tex]x=19/20[/tex]    [tex]or[/tex]     [tex]x=29/20[/tex]

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