kaihalojr
kaihalojr kaihalojr
  • 01-05-2018
  • Mathematics
contestada

Solve.
2x^2 + x - 1 = 2
A 1,2
B No real solutions
C 1,-3/2
D x = (-1 plus minus 3) over 2

Respuesta :

gmany
gmany gmany
  • 29-07-2018

[tex]2x^2+x-1=2\ \ \ |-2\\\\2x^2+x-3=0\\\\2x^2+3x-2x-3=0\\\\x(2x+3)-1(2x+3)=0\\\\(2x+3)(x-1)=0\iff 2x+3=0\ \vee\ x-1=0\\\\2x+3=0\ \ |-3\\2x=-3\ \ \ |:2\\x=-\frac{3}{2}\\\\x-1=0\ \ \ |+1\\x=1[/tex]

Answer: C 1, -3/2

Answer Link

Otras preguntas

I'm not good with this type of thing in math so I need help. 1 .▲PQR has angle measures of 108 degrees, 33 degrees, and x degrees. Describe how to find the mis
which word below completes this synonym/antonym analogy? failure: success:: forget: A. remember B. ignore C. disregard D. neglect
The distance from point A(x, 1) to point B(0, 7) is equal to 10. Calculate the value of the abscissa x.​
Actual distance = _ miles
Aria is taking an anatomy class and is trying to remember the names of the bones of the skull, specifically the cranial bones. She decides to remember the six b
When I ask a person what their life is, I answer: my life is an odd number less than 100, a multiple of 13 and divisible by 3. The life of the person is: a.​
In tge sentence " I would like to know the answer. The phrase to know the answer is a?
You make time and a half for all overtime. You make $9.00 an hour for regular hours. What is your overtime hourly rate of pay?
In tge sentence " I would like to know the answer. The phrase to know the answer is a?
Free P0ints! Happy New Year! Just type something to redeem 50 points!