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densk [106]
3 years ago
15

What is the value of the discriminant for the quadratic equation 0 = x + 2 + x2? Discriminant = b2 – 4ac –9 –7 7 9

Mathematics
2 answers:
padilas [110]3 years ago
4 0

Answer:

-7

Step-by-step explanation:

x^2+x+2=0 \\\\b^2-4ac= \\\\1^2-4(1)(2)= \\\\1-8= \\\\-7

Hope this helps!

Vsevolod [243]3 years ago
4 0

Answer:

Step-by-step explanation:

First get it into ax^2+bx+c

a=1

b=1

c=2

sqrt(b^2-4ac)=1-8=sqrt(-7)=sqrt(7)*i

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kirill [66]

Answer:

x = 3 and y = 2

or

(3,2)

Step-by-step explanation:

first equation (LCM = 3 x 4 x 5 = 60)

(x+2)/5 - (9-x)/3 = (y - 6)/4

12(x+2) - 20(9-x) = 15(y - 6)

12x + 24 - 180 + 20x = 15y - 90

32x - 15y = -90 - 24 + 180

32x - 15y = 66

second equation:

8(x + 2) - (2x + y) = 2(x + 13)

8x + 16 - 2x - y = 2x + 26

6x - y + 16 = 2x + 26

4x - y = 10

Now you have 2 equations:

4x - y = 10  ---> y = 4x - 10

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Substitute   y = 4x - 10 into 32x - 15y = 66

32x - 15(4x - 10) = 66

32x - 60x + 150 = 66

-28x = -84

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3 years ago
What is the degree classification of this polynomial?<br> x^2+4x-8
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6 0
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Galina-37 [17]

Answer:

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Step-by-step explanation:

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