lili423t lili423t
  • 22-03-2020
  • Mathematics
contestada

Solve x2 − 7x = −13.

Respuesta :

igoroleshko156
igoroleshko156 igoroleshko156
  • 22-03-2020

Answer:

[tex]\frac{7+\sqrt{-3} }{2} \\\\\frac{7-\sqrt{-3} }{2}[/tex]

Step-by-step explanation:

Step 1:  Use the Quadratic formula to solve

[tex]x^2 - 7x = -13[/tex]

[tex]x^2 -7x+13 = -13 +13[/tex]

[tex]x^2-7x+13=0\\[/tex]

[tex]\frac{-b+\sqrt{b^2-4ac} }{2a} \\\frac{-b-\sqrt{b^2-4ac} }{2a}[/tex]

[tex]\frac{-(-7)+\sqrt{(-7)^2-4(1)(13)} }{2(1)} \\\frac{-(-7)-\sqrt{(-7)^2-4(1)(13)} }{2(1)}[/tex]

[tex]\frac{7+\sqrt{49-52} }{2} \\\\\frac{7-\sqrt{49-52} }{2}[/tex]

Answer:  [tex]\frac{7+\sqrt{-3} }{2} \\\\\frac{7-\sqrt{-3} }{2}[/tex]

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