cheergirl21
cheergirl21 cheergirl21
  • 17-09-2017
  • Mathematics
contestada

How can I solve this equation 5x^2-2x-6=-2x^2+9x

Respuesta :

kphung76127
kphung76127 kphung76127
  • 17-09-2017
Add 2x^2 to both sides
7x^2-2x-6=9x

Subtract 9x from both sides
7x^2-11x-6=0

Factor by using slip and slide
x^2-11x-42
(x-14)(x+3)
(x-14/7)(x+3/7)
(x-2)(7x+3)

Then use the Zero Product Property to find roots
x-2=0
x=2

7x+3=0
7x=-3
x=-3/7

Final answer: x=-3/7, x=2
Answer Link

Otras preguntas

An object is sold for a price with an 8% tax. The final price is then $36.18. What was the original price?
Which of the following contributed to the fall of Middle American Indians to the Spanish? Select all that apply. A. weapons B. the Olmec C. the Maya
What is an extrovert
What 35%as a decimal? Please help!
What average force is needed to accelerate a 7.00-gram pellet from rest to 155 m/s over a distance of 0.600 m along the barrel of a rifle?
please solve for x 2x + 5x = 2x + 5 +13
What were the main ideas of Declaration of rights of man and the citizen?
What was the main concern with the first draft of the Articles of Confederation?
I need help on this question
Which expression means the same as “subtract 3 from 7 and then multiply by 4