nicholeashleyj1 nicholeashleyj1
  • 21-09-2017
  • Mathematics
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Solve 2x2 + 3x – 7 = x2 + 5x + 39 for x.

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AnimeArtistLife
AnimeArtistLife AnimeArtistLife
  • 21-09-2017
2x² + 3x - 7 = x² + 5x + 39

*Subtract x² + 5x + 39 from both sides*

x² - 2x - 46 = 0

Then, use the quadratic formula with a=1, b=-2, c=-46.

x = 1+/- √47. (Written 1 plus or minus the square root of 47)
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