lillyfeb1666
lillyfeb1666 lillyfeb1666
  • 16-04-2020
  • Mathematics
contestada

-x² + 7x + 5 = 10 need help ASAP and ols explane if you can​

Respuesta :

bhavya2vemuri
bhavya2vemuri bhavya2vemuri
  • 16-04-2020

Answer:

x=-6.192

and

x=-0.807

Step-by-step explanation:

1) turn this into a quadratic equation by moving it to the "10" to the right:

-x^2+7x-5=0

now quadratic equations are in the form of:

ax^2+bx+c

so substitute a=1

b=7

and c=-5 in the quadratic formula: [tex]\frac{-b+/-\sqrt{b^2-4ac} }{2a}[/tex]

so

[tex]\frac{7+/-\sqrt{29} }{-2}[/tex]

lets do addition first:

so

(7+[tex]\sqrt{29}[/tex])/-2=-6.19258240357

lets do subtraction next:

(7-[tex]\sqrt{29}[/tex])/-2=-0.80741759643

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