ash1613 ash1613
  • 10-06-2019
  • Mathematics
contestada

Solve the equation. 7x+17x^2-20=-8

Respuesta :

altavistard
altavistard altavistard
  • 15-06-2019

Answer:

Step-by-step explanation:

Rewrite this quadratic equation in standard form:

17x² + 7x - 20 + 8 = 0, or 17x² + 7x - 12 = 0.

The coefficients are a = 17, b = 7 and c = -12.  The discriminant, b²-4ac, is then 49-4(17)(-12), or 865.  Because this discriminant is positive, we have two real, unequal roots.  They are:

       -7 ± √865           -7 ± √865

x = ------------------- = ---------------------

        2(17)                        34

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