Answer:
x = -5 + √65/2 or
x = -5 - √65/2
Step-by-step explanation:
-2x² - 5x + 5 = 0
2x² + 5x - 5 = 0
Here,
a = 2
b = 5
c = - 5
Now,
Discriminant
<em><u>D = b² - 4ac</u></em>
<em><u> </u></em><em><u> </u></em><em><u> </u></em><em><u> </u></em>= (5)² - 4(2)(-5)
= 25 + 40
= 65
<u>D = 65 > 0</u>
Then,
x = -b +-√b² - 4ac/2a
x = -5 +-√(5)² - 4(2)(-5)/2(2)
= -5 +-√25 + 40/4
= -5 +-√65/4
= -5 +-√65/2
<em><u>x = -5 + √65/2 or x = -5 - √65/2</u></em>
What sets of ordered pairs represents a function ? A={(2,-2), (5,-5) (-2,2)(-5,5)} B={(4,2), (4,-2) , (9,3) (9,-3)}
Zina [86]
Answer: A
Step-by-step explanation:
In a function, one x value (the number in front) goes to one y value.
In {(4, 2), (4, -2)}, the x value 4 goes to two y values (2 and -2), which lets you know it’s not a function.
Hope this helps!
Answer:
no the quadrilateral isn't a parallelogram
Step-by-step explanation:
For it to be a parallelogram, the opposite sides must be parallel to each other and in this case it's not.
