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Let $7x^2 + 5x = h$. What value of $h$ will give us exactly one solution for $x$?

 Feb 19, 2021
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7x^2 + 5x - h = 0      for only ONE solution, the discriminant must = 0

 

b^2 - 4ac  = 0

5^2 - 4(7)(-h)

25 + 28 h = 0

h = -25/28

 Feb 19, 2021

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